The computer looks fine and is very quiet. However, the power supply is underpowered. I tried to add a good video card to the system and the power supply can't handle it.
Oh, and if you have to contact HP support, good luck, they were less than helpful. The technician didn't know much about computers.
If you want an HP PC, I'd get a configure-to-order one, not the ready to ship. The ready to ship models, at least this one, apparently aren't made to be modified, otherwise HP support just says "not supported".