Hi V
I just interviewed with Sun so maybe I can help. Admin is based at FLL. All the people are very nice. I have no experience with the day to day but I know a few people who work there. They have a lot of good to say about the company. They feel they are treated/paid well. Pilots are SJU based, work a 5 on 5 off schedule, full bennies with 401k (50% company match up to 6%).
They have eight Dash 8's and are planning to add 3-4 more, hence the hiring. The company has very solid financial backing and expansion plans in the Caribbean. I have observed Sun since their inception three years ago. They have always been a first class and well funded operation. They do everything by the book and cut no corners.
FO's start around 30k, 6-12 month upgrade, then 60k. I believe they are having a small class in December so you may want to apply. Best of luck.