I used one before. Very good controller as long as you stay below 3000kv and 5S. Heatsinking and casing on the 1/8 ESC is topnotch. You can hook it up to a pc and play with settings. The motors are good too, but like mentioned before, the endbells needs to be looked after. Nothing a RC-Monster heatsink/clamp can't fix.
But the startup is not as smooth as the Tekin, Castle or Quark.
Here's a vid of the 1/8 Losi ESC in action
http://www.youtube.com/watch?v=dnwr1yJL8oA