Pros
They are quick in placing you in a company. But read the con section to learn more than the quickness.
Cons
So you decided that you can't handle your existing job or boss or management and started looking for an opportunity. It has been a bumpy ride and then you got a call from someone in Apex and the role sounded amazing and you decided to give it a shot. The next thing you know, you cracked the interview and then you are at work in your new company, most likely as a contractor to begin with. Yes, they are quick. But - there is more than quickness to their story. They are like piranha's when you want a job, After your life till you sign the documents. If you have any questions post joining - no one will answer to your email or phone calls. Cause they don't give a damn. I was given an opportunity for conversion to full time with my existing company. But apex wanted to make more money out of me so they convinced the client - conversion at this point is not a good idea. Seriously? You are nothing but a piece of financial transaction for them. I regret joining Apex and anyone who is on work permit - please don't consider them and mess your immigration papers.