I applied through careerbuilder and got a call to set up an interview in a timely manner. The initial interview was about 20 minutes, 1:1 with the manager. It wasn't difficult, it was more of an introduction to their company and getting to know me and my goals, to make sure they aligned. They explained the training program that they have.
The second interview lasted a good part of the day, where I was with the interviewer shadowing a client presentation. They observed how I dealt with people and went more in depth on the compensation and growth opportunity. I got to see the position first hand, which I really appreciated. The compensation discussed was a mix of base and commission, but not commission only like someone else said.