I had my interview with them over a week ago, everyone was very friendly, they help you get comfortable.
As everyone else said, take all the information you have on previous jobs and schools you attended, dates, addresses and phone numbers. There is a bunch of paperwork to fill out.
If they invite you to take the written and sim ride they will take your fingerprints first.

Just be yourself and show you are happy to be there, I know everybody already said this but I'll repeat it, keep a good attitude! Which should not be hard if you are there to learn a grow, I let them know that.

The written is 50 multiple choice, a lot of questions about a Jeppesen IAP, the simulator is very touchy but they are looking to see if you have the basic IFR skills, a good scan of your instruments. The guy in the sim was very helpful, he selected the radios even offered to take care of the power settings, you just fly it. Take off climb to 2000' turn left to a heading then turn right, then fly direct to the VOR, when flying to the VOR will give you holding instructions, I told him how I would enter the hold, then he told me I could do one hold and then he would reposition the plane to intercept the localizer and fly the approach to land. I did one hold and then the approach into Tampa.

They said I did good and to wait for them to call me. Now I'm just waiting, if I don't hear back from them I'll call to follow up by the end of this week.

Good luck, hope to see you in class!!!