PSA has the best qol of most any other regional based on the pilots I've talked with. When I jumpseat on mainline and we talk shop, they always say, "why don't we have that!?" when I tell them how our SAP works.
The SAP at PSA is the main reason I came here, along with the CLT base being an easy 1 leg commute for me. It is by far the largest quality of life enhancer you could possibly imagine. If I want 17-18 days off, I can have them. If I want to credit 100 hours and still have 11 days off, that's possible too. Weekends, holidays, birthdays, family events are all easy to get off.
The way the PSA SAP works is as follows: At PSA, there are in its most basic form, 2 tiers of pilots in any given domicile. Round 1, and round 2 which includes those pilots who are on reserve or have "build up" lines. SAP is only accessible to round 1 line holders. After the round 1 line holders are awarded their schedules, they then have a 24 hour period in which to swap, drop, move, or pick up any trip or flying that is in the open-time pot. The open-time pot updates periodically with new trips and flying so it is something that you are generally working on for a good portion of that 24 hour window to get the schedule you want. That being said, it seems that processing times are still rather slow based on the last SAP from October and not "real time" like they're supposed to be. Regardless, I still get what I want every month. I usually like to SAP down to 17-18 days off and 65-70 hours of credit. However, for November and December I have decided to work more for some extra coin for Christmas coming up and in preparation for tax season, but I still have thanksgiving off and I'll still have Christmas off too.