Carson Stuff-It Pro Microfiber Lens Cloth Cleaning System, Black (SN-80BKAM), Pro (Larger Version)

Worked well. Bit annoying to clean (and you do have to clean, or it starts smudging), but not a dealbreaker. However, after just under a year of service, the clasp on my large cloth broke. I was admittedly shoving it in my pocket for a year, which presumably caused it. If you're clipping it on a bag, you probably won't have this issue. As for me, I probably should order a small, as it doesn't have the metal clasp.

Handy little thing. Hard to lose, clips on your keys and is always ready to clean your lenses or screen. Great for someone like me who has gone through dozens of cleaning cloths simply because they get lost.

Poor quality control. Upon receiving and using for the first time, I realized a little too late that adhesive had been left on the cloth from the manufacturing or packaging process. It's a shame I found out after wiping it onto a lens, but it taught me to always inspect a new cleaning cloth before putting it anywhere near my equipment. I'd give it no stars for this oversight if I could. It's marketed for camera equipment. Come on, guys.

So I didn't have my readers on and I snipped the wrong cord - package comes with a small plastic clip that needs snipped to cut - unfortunately, there is also a small cord of the same color - both black - that holds the lens cloth to the pouch and yep - snipped the wrong one so be EXTRA CAREFUL - manufacturer may want to consider some other color or some other way to package as I imagine they get a lot of returns saying they are broken when in fact most people probably do exactly what I did and cut the wrong cord.

Bought this for my boyfriend and he loves it! Super convenient and since he always has his keys he always has something to clean his glasses with.