I have win7 on a dual boot system (thankfully), and I will say even after keep trying it for the last 2.5 years, 'I still don't like it' there are several reasons one is mainly trying to find your way around the horrible changes in the Control Panel layout, but the main reason is that it is my computer and yet on occasions windows will not let me delete a file or folder, even though it's one I created, on one occasion I had to format a drive to get rid of a personal file, and as for constantly asking for permissions to do anything, well that takes the biscuit as there is only myself registered and windows will not always allow me to alter the permissions settings to allow myself saying I don't have permission.
So my suggestion if you like 'tinkering' (well just read the above again)
Then again if you just want to use it more for just office type work, then there is not a lot to say about that as you just create or/and open documents and get on with them.
Support or no support, I will be staying with XP for as long as I can.