I got the VeggiChop because I'm trying to cook from scratch more instead of buying pre-chopped mire poix from Trader Joe's or frozen chopped veggies for soups & stews.
I have a certain breaking point, where a whole lotta chopping becomes... well, demotivating, and the soup just doesn't get made (pizza, anyone?).
I also have a TINY kitchen and an electric, full size food processor is simply out of the question.
The VeggiChop brings enough variation and novelty to the chopping process to keep me on task in the kitchen. I'm using a lot more fresh vegetables in my cooking now, saving money, and enjoying the work!
You'll still have to clean & cut the veggies (I've tried onions, celery, bell peppers, carrots, and shallots) into chunks before they go into the bowl. And if you're doing a stock pot of soup, you'll be doing a couple of rounds of each of the major ingredients.
And the chop isn't as even or "pretty" as a good knife chop or even a food processor chop. So if it's food for a party and you want a perfect dice of red bell peppers for garnish, get out your knife.
Also, I haven't had much luck with herbs or garlic. They stick to the blades and don't really get minced, even with the little paddle attachment that's supposed to help with that. I bought a garlic twist NexTrend Garlic Twist - Clear for the garlic, and use a knife for the herbs.
And although it says somewhere in the product info online that you can chop ice with this thing... meh. Not really. Or I couldn't... Maybe if you started with those tiny hotel cubes?
However, you CAN make fruit sorbets with the thing. Mark Bittman had a recipe in the NY Times recently for simple fruit sorbets, and if you let the frozen fruit thaw slightly first, you can make a nice two serving batch very easily with the VeggiChop.
What else: Oh. Easy to clean, just be careful with the blade.
Hope that helps!