I've got an HD7 and frankly, it's awful. I had an HTC phone before I got an iPhone so I shouldn't be surprised the build quality and industrial design is so poor. The battery cover doesn't fit on properly because something inside isn't aligned properly. The plastic all feels very flimsy. The speaker grille on the front will fill up with fluff and look ugly. The bezel for the camera protrudes from the back in a way that makes it sit awkwardly and rub on everything you put it down on. Oh and apparently nobody at HTC has heard of a diode because if I shut down my PC with the phone plugged in, the battery discharges (presumably into the PC) overnight.
But all that is minor compared to the main problem which isn't unique to the HD7: the capacitive buttons on the front. If you do decide to take pity on WP7 and buy one, whatever you do, find one that has mechanical buttons on the front or you will be cursing with frustration every time you're playing a video or a game or whatever and you randomly get pulled into Bing search or the start menu, etc. Worst design feature ever.
