The rosters are an 18 day a month cycle and the uniform is the usual business style outfit. Bear in mind that you don't get the normal staff travel perks of the larger carriers like BA,LH,AF,AA etc...
I did a bit of freelance corporate flying, it was kinda fun and good to see something outside the sterile environment. The operator I flew with was 3 jets owned by a family company... It wasn't even organised like NetJets, I'd order the catering, get the plane cleanec, get the loos dumped and all the other most glamorous jobs. It was really different to my 'day job' where I'd get on with 14 other crew, the catering would be there, the cabin would be clean(-ish!) and everything would be ready to go but I loved every minute!
The difference between having 400 passengers and 2 or 3 was something that took a long time to get used to. It could get really boring on a long flight if the passengers were sleeping or if they just didn't want anything. The team spirit is much stronger on a smaller aircraft, the pilots were always very kind to me (the said they'd miss the 'good fairy' once I'd put my nylon airline tie back on and left them) and you get to know the crews of the other aircraft... when you pull up on a ramp somewhere you know which bars you'll find them in!
Most of the private airlines like NetJets and PrivatAir wanted previous experience in a commercial carrier with a preference for crew who aso had corporate experience. If you fit those criteria then go for it, I had a ball!