I can share my experience with Hobbyking/Trackstar ESC's, motors and servos. I can also attest to their customer service.

I run Trackstar ESC's, 'Red Can' motors and servos exclusively. The only defect I've had was the little fan on one of the 3 esc's didn't spin as fast as it should. I took a video, submitted an RMA and they sent me a brand new ESC! They even express shipped it from China to me. I had the new on in 3 days. I did NOT have to send the other ESC back either! I've had no issues with programming them, glitching, performance or heat. They all run amazingly well. At a fraction of what "high end" electronics cost, I can not justify spending that much anymore.

I should also mention that I've even podiumed a few times beating out guys that were running electronics costing 4 and 5 times what I've spent.

Yes, I get teased at the track from time to time, until they see the time sheets!