I thought they tasted funny, but they were ok with Clam Chowder, just don't use the number 2 pencil to stir the chowder.
Well, they don't even know how to spell "cracker", so I wouldn't really trust them for any exam type stuff...
My professor writes test questions for them. I have never used them, but my prof. is brilliant and a great teacher.
I used them for the mcat. They were alright. The questions at the end of each section were pretty easy. My kaplan books were way better.