I am not too impressed with this product. With the size of the item being quite large/bulky, I expect this chopper to be more mighty and sharp. However, not only is the blade and the top hard to align when you are trying to close it, the volume of food you can chop at one time is quite limited. In my case, I had to cut a small yellow onion into half and do it twice.The way this works, is that, every time you push the handle/bar down, it will chop the food using the razor blade (zigzag) and automatically turns it a little bit. However, you will have to push it down a bit hard using your palm, which I can see can be a problem for some people. Sometimes, the blade gets stuck, sometimes it doesn't chop fully. The end product is in the third picture, and as you can see, the onions are not too finely chopped.If you are looking for a product that gives you finely chopped food (like minced garlic), maybe this product is not for you.