Pros
They do have a wide network.
Cons
They do not give you any training or support. You are just thrown in the deep end and left to get on with it. They assign you to schools that are unruly and known as 'naughty' schools. The upper management do play favourites with their staff. Once the company invited a select group of people go go BBQ at her house. I was invited but didn't go when I found out all my other connections did not make the cut. They do not take protecting your personal details seriously as well. My friend once applied after me and was given documents to take away with her. She called me and identified things from my CV that she shouldn't have known. I asked her how she knew and she said my CV was on the back of the documents this company gave to her. This is a complete breach of confidentially. They of course denied it when I advised them that they should be more careful with this information. After that, they blacklisted me. AVOID!