I recently bought an RC10GT RTR plus, I removed the restricter from the carb, and tuned it right, it was very fast, a little too fast on pavement, it would actually not even steer because the front tires didnt make good traction. Plus it ran great, always ran the entire tank of fuel out without shutting off.
But of course the bug bit me, I now have a new RB engine, Hardcore racing chassis, and RPM everything for it. I am also putting 1/8 scale buggy wheel adapters. The biggest problem with the RC10GT to me is the tire life for the rear tires, man, even in the grass and dirt they wear out very fast, so now I am using 1/8 buggy wheels because they have better tread.