Pros
They are helpful in preparing you for interviews.
Kontras
I am a contractor and was hired in for a three month contract-to-hire opportunity. When my three months were up, I contacted my recruiter because no one had reached out to me to discuss my transition to a permanent employee. They told me that because my company switched vendors, they had to "renegotiate" my contract for six months. This was done without my notification or consent. In addition, their pay system is flawed. I am required to manually enter my hours in twice each week. I forgot to enter my hours one Sunday, and received a call on Monday from an Apex employee. She asked me how many hours I worked, and said she would take care of it. I didn't receive my paycheck until the next pay period, and I had to borrow money from family to get through the week. When I received my paycheck, it was short. I'm still trying to resolve this issue. I would not recommend Apex to anyone I know.