Vantaggi
It is like being part of a big family, everyone talks to everyone regardless of their employment level and where they sit in the office. Everyone will make you feel comfortable, and the atmosphere is very friendly. There are many fun company involvement activities which everyone would enjoy.
I liked the work I did but more on it in the cons.
Svantaggi
I was part of an old project and hence did not really get to learn new technologies which I eagerly wanted to. But that cons was for be, might not be for others based on what project you join.
Other than that I can't think of any cons really.