My dh bought me a KitchenAid top-of-the-line processor several years ago. I love having a food processor--this is my first experience using one--but there are a few things I DON'T like about mine. I'm not sure whether there is any way to get around these issues, but here is what I don't like:
1. There is a post that comes up through the middle of the bowl. This is what the blade slides onto. When I'm done processing something, I have to take the bowl off the processor, which means off the post and that leaves a hole in the middle of the bowl that things can easily fall through.
2. My processor does not dice. I don't know if any of them do, but mine does not even though it says it does. If you put things like celery, carrots, onions into it, it will sort of slice them all up but you will not get all little pieces; you may end up with long slices. This is ok for soup but not for many other recipes.
3. It is very difficult to use the feed on mine for slicing/shredding unless you have items that completely fill the feed tube. For instance, if you want to slice carrots, you are supposed to put them vertically into the feed tube. There is nothing to hold them in place unless they completely take up the feed tube area so when you start the processor, they tend to slip around and turn sideways. With cheese, there is almost always some that clogs in the rim of the lid and I have to pick it out. Not a big deal, but a bit annoying.
4. The bowl goes onto the machine with the handle to the left of the center lock. You turn it counter-clockwise to lock it. If you forget and put it on from the right and turn it clockwise, you may never get it off without breaking it. This has happened in my house and we did manage to get it unstuck but it took a lot of work. It isn't marked on the machine which way it goes. Along the same lines, if you have finished processing, you MUST remove the bowl in one direction only; if you do it the other way, it can get very stuck.