Vantaggi
Unfortunately I cannot really pass on many true pluses except that the company seemed reasonably positive about training, and I was sent on an interesting course a few weeks after joining.
Svantaggi
Whilst I believe my experience was not entirely typical (due to the nature of what I was doing and where for the company), overall it was probably the worst permanent job experience of my career. I didn't get to do the work I was hired for due to project and organisation issues, incumbent contractors were allowed to hog all the existing systems and interesting work, and I left after 9 months suffering from not having used my skills much. Annual and quarterly review procedures were handled poorly by my manager and this, combined with the situation with the project I had been hired into, culminated in me resigning. Exit HR procedures were also poor in my opinion, including no exit interview. So management outside the project in question have no idea what happened, why, and who was involved.