Everything DA2Easy said is pretty much right on.
As far as overnights, and time off at hotels, it depends on the fleet. If they throw you into the Citation X, Excel, Falcon, Sovereign, or G-200, expect them to beat the crap out of you. lots of flying.
What I hear, Ultra and Beech Jet don't work as hard, plenty of time for a work-out or a couple of cold ones. If show at the FBO, always have something good to read.
Hawker 800 (which I'm in) kind of in the middle. My first two years they worked me hard, this year I haven't done anything. A lot of sitting around.