Vantaggi
Projects can be interesting provided you are one of the lucky few to get a good one. Work can occasionally be good if you have a good business manager.
Svantaggi
A common problem is business managers will say anything to get consultants in the door. And then placed them under pressure to accept projects they might not be a good fit for. When joining they promised a project that they did not secure. It was a contract that used totally different technologies to what I interviewed for. From talking to other colleagues they did this to everyone. So beware! They can be extremely unprofessional and provide very little guidance or formation. Yet they will accuse a candidate of unprofessionalism. You are expected to figure out most things yourself with little guidance. I saw one colleague nearly fired as he was not trained properly to do time sheets so he did it incorrectly. I have personally some Business Managers take a perverse pride in not responding to some mails from consultants even though some are hard working and try their best to do so. If you try ask for training or to develop yourself you can be considered a problem or simply ignored. The turnover rate is very high as even your business manager who hired you will not stay long. They regularly work until 8/9pm each night.