It's only $19.95—cheap batteries aren't always bad—so it's quite the deal compared to the $97 Mugen or $70 Seidio batteries. The back cover doesn't look too bad either. It's not as nice as the OEM door, of course, but I wouldn't call it hideous.
I don't know if 2200mAh is worth fattening up your EVO for, especially considering the slim 1750mAh and 1800mAh batteries that are the same size as the stock battery, but it only takes $20 to find out for yourself.
[Amazon