Did mine at VGT.
Some people get 0530 flights others 8. If you are non-career expect to fly at 0530 and then ground from 8-? (5-6)..we would stay till 7-8 PM every night as a group then study at the the apt 'till we went to sleep . Career guys only get 2 flights + spin, have your "s" together. We seemed to get scheduled when there was no ground with a 0800 start time. Non-career guys have their hands full, learning the ATP way+CFI stuff is a chore.
Marcus is gone, a new 2 year is on the way. DM did our sign-offs, he's very through in the airplane. I'd try and fly with him as much as possible, he picks up on everything and will prepare you well. Study VGT airspace and the diagram, it's easy to get tripped up there. Don't be un-aware and fly into or near the bravo..the instructor is looking at you're ability to be aware. Learn the practice area, landmarks, exc. 800AGL traffic pattern might be a little different, and don't expect to get much practice at it. It would be good to get the spin flight before the Seminole flights because you can learn layout and landmarks before burning your 4 hours. The signoff isn't easy to get, it's not just automatic. They will need to see you talk your way through every maneuver (memorize the drag demo and accelerated stall BEFORE your flight) and the instructor will literally go down a checklist. Try and get as much signed off on the first flight so you can just polish up a few maneuvers and do pattern work for the second flight. A few guys bombed the first flight and ended up not getting the sign off or doing an extra flight...don't sweat it if this happens. They just want to make sure you'll pass the test. Fly from the right seat before you get there, don't add learning the Seminole form the right to the list of new things you'll be experiencing.
I'd study FOI before I got to VGT, as well as PVT type stuff. The syllabus for the ground school was the PTS. Take notes right in your PTS, tab your FAR/AIM. Study the Vegas sectional, cloud clearances, AFD, Weather and WX services before you go. Very little if any time devoted to this during the class, know multi-engine aerodynamics fort to back. Be able to demonstrate it to "instructional knowledge" in front of an examiner for a good 20-30 mins. Big chunk of the CR.
Overall, most of my class ended up going home but everyone that stayed passed first time through for the initials at least. It's a long 10-14 days, but in the end if you devote every moment to studying you'll make it. A few guys just didn't feel ready or were out playing around all night and bailed. Hook on to the guys willing to study and work with them, it helps. I had BL for the checkride and he was through but fair, defiantly expects you to know your stuff...but likes to see how you'll preform under pressure.
Apartments are located in a rough hood, take valuables with you everywhere. The apartments themselves are in decent shape, ATP does a good job of keeping them somewhat clean and functional. You can get internet in 3022 by sitting at the kitchen table and connecting to the neighbors un-secured web.
Put in the work and you'll be be rewarded with the CFI... No handholding here, take it seriously and pay your bills/take care of outside stuff before you go, be able to devote your mind to this...otherwise it will end up costing you a bunch of money and headache. All the guys that made it were hard workers and good people, learned as much from them as I did from the class...
I was lucky to have some sharp guys to study with, would've been tough without it...made a few new friends too. Had a good time looking back on it, extremely rewarding.