Being stuck here from 10:00 to 1:30, I got to wander around Terminal C a lot. They have a lot of interesting displays throughout this terminal (old Flight Attendant uniforms, playing card packs, etc) and a few places to eat (Sbarro and Dick Clark's), but I agree with MacRae, the decor and building is definitely stuck in the 80's.
The free wifi is ok but you have to go around the terminal a bit to catch a good signal.
I did ask a few people for help on getting to the bus pick-up and they had no idea...but a taxi stand person knew where I had to go.
Check in on the return home went quickly, though would have been faster if stupid people weren't in front of me. The staff were pretty good, though.