Kuuk Onion Chopper - Also for Garlic, Tomatoes, Salsa and More

Is this dishwasher safe?

Do you think i should get this, or the kuuk hand powered food processor, mixer, spinner? i want to try my hand at making salsa, and i do a lot of choppand such for soups. would this be a better by, or the other product i mentioned?

what are the product dimensions?

Does it take a lot of strength to use? I am interested in buying this for a young kitchen helper.