Pros
The hourly pay is competitive against the rest of the industry. They are open about their pay range so just ask for the most if you think you're qualified. They are fairly pleasant to work with if you need them for anything. They moved quickly through the placement process and had an interview for me in days from their first call.
Cons
Good luck getting a raise. There is no mechanism to be rewarded for your work. The 'right to hire' terms were pretty insane.. 20%+ of your annual salary to accept a full-time position if one was ever offered? On top of that, they'll frequently call you with other positions they're hiring for, forgetting you already work for them. I've been with them for almost 5 years now and I can count on one hand the times I've talked with MY EMPLOYER.