I just got hired and will start in a little over a week.
I had 5000 TT with 1950PIC and 3 years previous experience at Expressjet. Other guys in my interview ranged from Gojet RJ captains, Skywest RJ captains, a Cessna corporate pilot, a couple 135 guys, a FAA guy, and myself who has been a corporate test pilot for the last 4 years.

I emphasized the fact that Spirit was the only airline I applied to. I think this is a very important thing to get across as they do not want people to jump ship after a year.

In summary I would say they had a very talented group in the interview and everyone was super happy to be going to Spirit.

Hope this helps!
Good luck.