We stayed at the Mariott as well! I really liked the hotel, especially how easy it was to get to the con center from the hotel itself. We had to park at a garage a few blocks away because my friend's truck wouldn't fit in the Mariott garage, but it was fine.
I have to agree about microwaves; we would eat out and have leftovers but couldn't save them because they would need to be reheated. I was also bummed with reception in the lower levels aka the meeting space but thats nothing that can be fixed. Awesome hotel otherwise!