Pros
Can't think of any !
Cons
No growth either in terms of career or salary! Absolutely nothing. They will pay you in peanuts while billing the customer decently. Every year at review time they will ask for customer feedback. No matter how positive the feedback is it will make no difference to your growth. Ask for a pay rise and you will have the best roller coaster ride of your life. The best part is, they kept deferring Work Place Pension as long as they could (and was advertised with such emails as they were the pioneers !!) and will pay in equivalent to a few pints of beer ! You will be lying in a corner working at a client location forgotten, You will receive emails about their "drinker's club", poker etc.. social night out and how much fun they have. They try to keep you diverted with all this stuff.