Couldn't be doing with a bed like that myself, but if you're alright with that particular style, then that one looks fine, in my opinion.
How tall are you? Cos if you're anything over about 5'4-5'5, you'll probs be too long for it.
I had a bed like that for college last year. It saved room for my roommate and I, but I would never want one otherwise.
My little sister has one like that, she's only 13 and finds that she is getting too big for it! It'd prob be ok if you're small (e.g <5ft5) but you should buy a better mattress than the one it is supplied with.
seems like a kiddies bed to me; and problematic when you think about grownup activities usually associated with beds.
well, its not like he's got much choice if he's living in a boxroom
as for getting jiggy with it, he is at his parents so am guessing there won't be a lot of opportunities anyway and he can use the other half's bed