ive used golds for just under a year, i have done very well. I have burnt two sets out, this is due to me thrashing them (if there not running full speed then there stalled!) You can get 20mph out of them, but will increase acceleration time. I run 24vs at 24volts, with 15amp CPU electronize controllers with 24v 3Ah NiCads.

The motors are well built, and are very powerful. The only problem is with heat, as the are totaly sealed, they get hot very quickly. Im drilling air holes in the next pair (Unless i move onto bigger motors).