Centerline did such a great job for me, I felt that I needed to try and get the word out for them. I was just hired with Delta, and Centerline's services were invaluable. Keith at Centerline gave me the confidence I needed to make it through thie day. Here's what he did to ensure my success:
1. Went through my application line by line. He made sure that it was 100% correct in every way. Not only did this help me get the interview, but it also gave the interviewers ZERO ammunition to pick at me about. My interview only lasted about 35 minutes. A perfect application (and spotless logbooks) helped.
2. Totally revamped my resume. Didn't look at it during the interview, but definitely helped me get the invite.
3. This is the big one: Keith spent hours and hours working with me personally via Facetime. He gave me tips on how to present myself, things to watch for, and most importantly, things that the interview team are looking for. Through his guidance, I was able to maintain the frame of mind that I needed to be successful. There are thousands of questions that you can be asked in the interview, there is no way to prepare a 'canned' answer for each. Keith's method gave me the confidence to answer any of those questions with ease.
4. Lastly, Keith was always there to answer any of my stupid questions. He worked with me for nearly a year and a half, and had to answer plenty of them. I could always count on him for solid advice.

I feel so strongly that Centerline contributed to my overall success that I came on these forums that I dread to try and get the word out. They're not a huge name yet, but they should be. Check them out!