I worked at SAS for just about 6 years and enjoyed it. There were things the company could have done differently, but it's basically on par with other ambulance companies out there. All of the 911 ambulances on 24-hour shifts had stations which is much different than other companies. They bought a ton of brand new ambulances when they received the LACoFD contract and that was also a plus.
Cons
A lot of people felt management didn't care about them -- I wasn't one of these people. Moral could be low at times. There's not really much a ladder to climb here...just basically from EMT/Paramedic to Field Supervisor. Management positions are slim. The fact that they don't pay the entire 24-hour shift in 2015 is mind boggling, but hopefully that's changed since then.