I purchased front & rear GM ceramic pads a couple of weeks ago from Gene Culley for my ’05 C6. Had them on the car for about 100 miles and replaced them with sintered metallic pads. They seemed to stop the car fine (it's true, a little more pedal pressure), but I just didn’t like the “feel” of the pads.
If you thought about trying ceramics, this may be a good deal for you. $40.00 local sale.