I've had my HD2 a week now so here are my thoughts...
Pros
- Amazingly customisable - there's already a number of decent apps/themes/tweaks/mods coming out of XDA and a load of help for any issues. A lot of them really are 'must haves' as well.
- Interface is generally amazing, from the main home screen to text message conversations and everything else.
- Opera is blazingly fast when combined with some XDA tweaks and mods. It absolutely blew my friends iPhone out the water (connected to the same WiFi) - his took a good 3 seconds longer to load Amazon.com than me, and his loaded the mobile version, while mine had fully loaded the desktop version.
- Using it as a modem couldn't be simpler. I literally plugged it into my laptop this weekend while at my parents, selected Internet Sharing on the phone (as opposed to Sync and File Transfer) and I'd already connected to MSN and the like by the time I looked back at my laptop.
- It's very fast, and I haven't had any loading delays or anything of the like other than when it's still booting.
- The keyboard is very accurate and easy to use once you get used to it (I came from an N95 and I'm pretty quick already).
- Facebook integration is seamless and awesome.
Cons
- Text message bug seems to be a problem still. Occurs randomly but semi-frequently, but hasn't for a few days now.
- Updating the ROM (software) is extremely long winded at the moment - don't know why, possibly because the ROM update is leaked at the moment.
- The Facebook app is ****, although a lot of the 'problems' are also shared by the iPhone one.
- Opera doesn't support Flash and using IE is just a plain nono.
There's a few other small niggles, but I'm very picky and hopefully nothing that can't be solved by the geniuses at XDA or HTC themselves.
My home screen (quality is better on the phone's screen, the screenshot app has just reduced things a bit):
Some apps:
www.rghjones.co.uk/htc - browse there directly on the phone for the easiest installation.
I'd recommend:
TorchButton_v2.2 - An app for using the flash as a torch
Touch X LEO turbo - Improves performance by increasing cache etc
Transparent Slider - Makes the home tab slider transparent
Vovichek_Jamrecords_20shcut_m2525 - Puts a grid of 5x4 quicklinks on the home screen
brianstaskbar - Taskbar icons (see above)
curtain - Removes the semi-transparent curtain behind the network operator text (see above)
duttys - Awesome task manager
inbox - Adds a "Mark as Read" menu item to the inbox
regedit.Stngr_ARM - A basic but functional registry editor for doing more tweaks
Also see this awesome thread for loads of tweaks etc:
http://forum.xda-developers.com/showthread.php?t=583638
I hope that helps people a bit!