I just flew with a Captain that is one of the interviewers, so I had to ask him what were some reasons he didn't hire someone. Two answers, first one person's answers were not smooth or well thought out. Interviewing properly is a required skill! That should end the debate for those wondering if they should go to interview prep. The second, a military pilot misrepresented himself. He said he was a Chief of Safety and a Chief Pilot. If you have Chief Pilot on your resume you had better have been an Ops Officer/XO or Squadron CC. Just because you ran your Stan Eval/NATOPs office or were squadron FSO does not mean you were a Chief Pilot or Chief of Safety. These interviewers are former military, they know! You're NOT going to get anything past them. When this candidate was asked about the positions it was clear he had none of the experience he claimed.
But it sounded like the success rate was higher than 80%. Many 10K+ hour RJ pilots getting interviewed. However, side note, UA not impressed with the "been there, done that" attitude these regional pilots are showing up with. Don't be that guy! Good luck!