While studying in my hotel room for my Skywest Interview in early December, I discovered the gouge on
http://AviationInterviews.com about taking the simulator prep at American Aviation. I called them up at 3 pm and they were able to fit me in for about an hour starting at 4 pm. Here's their contact info:
http://www.airnav.com/airport/SLC/AMERICAN_AV . BTW, call and set up an appt NOW, as I was VERY lucky to get a sim on such short notice. Two big tips for the sim: Brief the approach BEFORE you takeoff so you won't be task saturated in the air; and brief and FULLY set up for the Missed Approach on final so you can hopefully avoid actually having to DO the MA!
The sim prep TRULY paid off, costing only about $75. I did my sim prep with Brandon Rasmussen. He use to fly for SW and can tell you how to fly the sim (throttle settings, approach speeds, etc). He prepped me with the profile that nearly exactly matched what I flew the day of the interview. The profile is fairly easy if you're proficient, but I think it would have been tougher had I NOT been prepared. One guy was eliminated based off the sim

. It just as easily could have been me. Fortunately, he can try again in six months.
Even if you take the practice sim, be prepared for anything. One of the first questions the SW HR people asked was: "So, how many of you did the sim prep at American Aviation?" Naturally, none of us said "I did," but I think many of us did.
Good luck