I originally hired on Raytheon TravelAir. But, now I am a FlightOptions pilot. I've been in the Frac's for 5 years now. Overall, FLOPS has been good to me. Is there room for improvements, yes. I do believe upper management has realized they cannot tick off the pilot group. They have reversed some of their stupid decisions because we let it be known we were not happy. All of the frac's have issues, it's just a matter of what kind of schedule you want and equipment you want to fly.
We are on a 8 on 7 off schedule. All the new hires will have to live out of 18 possible domiciles. You may or may not like the choices.
Pay could come up a bit, but knowing I'll have a job for awhile let's me sleep better.
I'd advise you speak to each fractional and get all the information on pay, per diem, schedule, benefits, equipment, and upgrade time and choose the one that fits your requirements.
Good luck