hiya! well I think it depends on who you work with, i'm quite lucky and work with a great bunch of lads and have a great time and really enjoy it. The pay is pretty awful and there's not much in the way of a career to make out of it. That said though it can be great fun!
At the moment just before the season kicks in, at small-medium airport i'm at usually have 5 or so aircraft to do in a shift (usually between 7-9 hours). Summer its usually going from one aircraft to the other, not much chance for a break and lots and lots of overtime!!
Good luck to you if you want to do it and hope you enjoy it!!
Flyboy