I first got my HD7 in feb of this year and loved it even though it had and still has some major things missing.
At first it was amazing untill i found out quickly that i could not copy and paste, but that changed with the march (which turned to the april) update.
Some things that need to be changed is the ability to bluetooth to phones rarther then just headsets, also the ability to use mms for videos and music instead of just images, the same being with email attahments.
The xbox live feature is pretty amazing, your not able to use multiplayer since its more of a scoreboard, the achievements roughly come to about 200G per game split into 5G 10G and sometimes 20G the games being anything from £2- £5/£6 per game.
One of the games coming in the next 6 weeks to WP7 will be Angry Birds which like many others, i have been waiting for for ages
specs of HTC HD7:
Windows Phone OS 7
internal storage: 16GB
512 MB ROM and 576MB RAM
4.3 inch touch screen
internal GPS antenna
bluetooth 2.1 with A2DP
wi-fi ieee 802.11 b/g/n
3.5mm stereo audio jack
5 megapixel colour camera with auto focus and flash
720p HD video recording