I'm quite interested in this too. From what I've seen on tv and stuff you get (what i saw was for army) a fairly spacious room with a double bed. You get WIFI at all or a little old maid that cleans your room twice weekly or summat?
The type of accommodation you get will depend on where you spend your shore time and most establishments have SLAM (Single Living Accommodation) which is based very much on Travel Lodge standards. Long overdue and a far cry from the pathetic 10 to a Mess most of us old buggers had to endure back in the 70's, 80's and 90's.