My Xbox set up experience was rather straight foward and easy, just plugged in two leads in two different holes lol. I'd say the hardest part Ian is going to be creating yourself an Xbox live acount, typing is really a pain in the arse without one of the little keyboards that clip into the controller. Had one for my 360, made things a lot smoother!
As well as gaming they're good for Netflix and watching DVD's.
Be warned though, you have to install games before you play them,its not too bad though, once they get to like 12 percent or something you can usually start playing and it'll download while you play. Seemed like an eternity to me though when I wanted to play Assasins creed and had no games installed