It is definitely Chinese, but I like that they have a 60 day return policy. That should be enough time to evaluate it and send it back if necessary. What I don't like is the price. I only paid $50 for my Inspire. $40 for a battery that will probably only give me 2 more hours at best makes me hesitant. I'll give it a little more time to see if someone comes out with a better quality alternative.
I just searched eBay for "HTC Desire HD battery" (same as Inspire) and found many for under $10. Same exact picture even, although I know the picture doesn't mean anything. I'm buyng one for $4.89 with free shipping and I'll report back on the quality once I've used it.