MicroPack Trackball Wireless Mouse, Upgrade Right Hand Ergonomic Mouse with Wireless Vertical Rollerball Computer Mouse, 3 Adjustable DPI, Easy Thumb Control for PC, Laptop, Mac, Windows - Black

I bought the black vertical mouse a couple years back but temporarily lost it during moving so I bought two new ones the same one but in a pretty and light mint green and the scroll ball version as well and than of course I found the one I lost.While I haven't tried the new ones yet and I will update once I have used those for a while, I will however give a update on my old one: it is small which fits my hand perfectly but is too small for my husband's hands (The scroll ball version is slightly bigger almost making it to big for my hand).Easy to use I love that it has a USB and C connection (The scroll ball version only has USB) the battery lasts two weeks to a month for me depending on how much I use it and if I remember to turn it off, I think it does have a sleep mode that helps to save battery as well.Never had issues with lack of connection or lag even when out camping where there is no wifi.

I've used trackballs for years. For me they allow easier and more precise control. I suffer from right wrist carpal tunnel and after a half hour or so of computer use my right hand goes to sleep. My doctor suggested a handshake type mouse is a more natural position and might offer some relief. Following a fairly exhaustive Amazon search I purchased both of the MicroPack Ergonomic Wireless Mouse's or more correctly Mice on offer. I was looking for a wired model but could not find one meeting my requirements . The Micropack Wireless Models were the ony ones I could find that could address the carpal tunnel. I'm keeping both but I like the other one best. It gives you the option of rolling on top or on the side which is good because when my carpal tunnel kicks in, the thumb does not cooperate. However, I like both of them.

I am disappointed in this design. My last roller ball mouse lasted years and worked great till it just got worn out, so I am familiar with them. The ball on this mouse has a lot of play and there is not a firm hold on it. You can place your pointer on a spot, left click, and the pointer might move a bit due to your hand moving (I have a small-med hand). If you move the pointer where you want to click and let go of the ball to try and keep it in the same place as you click, the ball moves, so the mouse pointer moves, and you click on the wrong spot. This would be a disaster for things like photo editing, I know it is for my vinyl cutting program where accuracy is vital.Another slight annoyance, is my last roller ball mouse went to sleep and all I had to do was move it and it came back on. This mouse, I have to turn it off and back on each time.I think I will be looking for another option in the near future and will return this.In general, disappointing.

I absolutely hate touchpads and in most of the places where I use my laptop and even on several of my desktops, the real estate is such that using a traditional mouse is very difficult or impossible. I usually rely on trackballs. They all have had some drawbacks. I have a Logitec and a Microsoft in the standard horizontal configuration. First of all, horizontal is not very ergonomic. The natural position of your arm on the table it is to have the hand vertical. In addition, because of the design, your hand tends to push forward on these devices making them slide. On my large desktop computer, I actually have used double-faced tape to stick it to the desk because the sliding became so annoying with the Microsoft unit. This device is extremely ergonomic and natural feeling to use. There is no tendency to slide or move whatsoever. I have never used the "forward/back" buttons on any of my other trackballs so I don't miss their absence on this device. You can switch the sensitivity but the press of a button behind the thumb wheel. Very convenient. One thing that does take a little getting used to is what to do with your thumb when you're pressing the left mouse button. With a traditional horizontal trackball, you're pressing down toward the table so there is no tendency to move the cursor. With this device, when you press on either the left or right button what you're actually doing is "squeezing" the button towards the ball. The result is there can be a tendency for your thumb to move slightly on the ball and move the cursor. This gets a little easier to control with practice however there's also a very convenient ridge right above the trackball to rest your thumb on when you're pressing the buttons which makes it a little bit easier. Dragging and dropping is the only thing that is really kind of tricky. With a traditional mouse or trackball, since you are pressing down on the button, using the ball itself is an independent motion and easy to do. With this device because of the squeezing action, it's a little tricky to keep the left button pressed while you are manipulating the ball to drag something to a new location. Not that it can't be done. With little practice you can learn to press slightly downward on the button as opposed to the left which takes the pressure off the thumb and allows you to do the dragging motion. What would really be nice is a mechanism to turn the left mouse button into a sticky key but I haven't found any way to do that yet.I have seen reviewers downgrade the device because the ball becomes "sticky". As someone who has used various designs of trackballs for well over a decade, I can tell you this almost always results from either the ball itself or the supports inside the ball cavity becoming dirty. If you are using this in an environment where your hands are likely to be dirty or sticky or there is a lot of dust around, frequent cleaning is definitely going to be necessary as with any trackball. And if you have little ones using your computer, figure on cleaning the ball mechanism pretty much every time they get their hands on it.The price is very reasonable and if you are looking for a more ergonomic alternative to a traditional trackball, it's well giving this a try. I will probably be replacing the cursor control devices on all of my computers with this unit.UPDATEI'm afraid I have to downgrade my rating to 3 stars. I have been using these devices on two of muy laptops for 4 and 6 months respectively. To those reviewers who said the ball became "sticky," I know now what you mean. It is not so much sticky as rough. Originally both were smooth as silk but BOTH have now become extremely rough and jumpy, I have removed the balls and thoroughly cleaned the balls and sockets-no help. There is something with the tiny supports that hold the trackball. the ball itself seems fine but it feels like it is resting on sand. Actually hard to get the cursor in the right place because it is so jumpy. Since it happened on both of my samples and I have never had this happen with other brands, I have to assume there is a defect in the design or materials. I can no longer recommend this device.

Came as promised and on time. I like the feel and the comfortability from the angle. My thumb isn't as tired from usage. Every aspect is great accept for the forward and back buttons which I am trying to figure out why they aren't working. Other than that, great product with a great price.

BUT the ball moves if it's not level. I don't yet have a level surface for my input devices, but since I like this one I'll make it happen. If you let it tilt to the left a little bit the cursor will move when you take your thumb off the ball because the ball will move slightly. This can lead to mis-clicks. All of you using a proper desk or table should never have this issue. I compute from my couch with a big rounded armrest--and is why I had to quit using mice. I did have trouble getting it up to speed on one system to I swapped it to the other one where it works fine. If it weren't for this I'd buy a second one for the other system, but a new release of Mint should fix that, and it's up. I just haven't done the upgrade.