You know, I was thinking about this last night after getting mine in. In kit form they're selling for $149.99, which includes three pads and a 16oz. bottle of SPEED. Right off the bat, that's $43.96 (retail) of products. If we call the carrying case (being very generous) ~$20 retail, that leaves us with just over $85 retail for the polisher itself -- significantly cheaper than any other DA of this type on the market.
From a value proposition standpoint, perhaps we're expecting too much of these machines? They were clearly built with the idea of being a knock-off of the Porter Cable, which could ultimately prove to be good or bad.
Can you tell where the overheating is coming from? Is it in the head/spindle assembly? Or is the electric motor overheating?
I definitely think I'm going to be tearing mine down to grease the gear drive and bearing/spindle assembly, in hopes that it will prevent those sort of issues and also smooth out the operation a bit.