This is a handy little tool for quick chopping for quick week night dinners. I use it all the time.It is definitely handy for when I have to cut up fruits and veggies for my one year old to try. Power This chopper is as powerful as you want it to be. It uses your hand power not electrical power. It chops as fast as you pump it to chop. Safety It is safe as long as you use your head. Obviously you do not put your hand underneath the chopping machine. It does come with a little cup that you attach so whatever you chop goes in the cup. So as long as you attach the cup to the bottom you will be able to use the device safely. Although I still do not let my children use it. I'll wait till they get a little older. Ease of Assembly Super easy. It comes with very simple instructions and really the only piece you have to worry about is the cup that attaches to the bottom but that is easy to attach and take off again. Ease of Cleaning I usually throw mine in the dish washer but I do try to hand wash it. The cup at the bottom comes off and you can wash that separately.