Pros: great coffee cart, free gym membership
Cons: short term contracts
SPI is a great place. They really take care of you. There are occasional late hours and some Saturdays, but that comes with the territory. My peers were really friendly and helpful.
I cannot complain about the job security at SPI in general, as short term contracts have been an industry standard for a long time. Each film is different in its own way, and sometimes they do not need you for a particular project.