There were three interviews I felt really great about. I got in at one and haven't heard back from the other 2.
There were two interviews I felt so-so about. I was ranked highly on the waitlist for one (although did not get an offer) and haven't heard back from the other.
There were 2 interviews I felt not-so-great about. The first was just an odd interview format in itself, and I was a little psyched out by the others I was interviewing against b/c I thought they were more impressive than me. I ended up being that POIs first choice, so I obviously did something right. The other wasn't so great b/c it was my last choice by far, my last interview, and the whole visit to the school itself confirmed that this was just NOT the program for me.
Just a note: even if an interview goes well and you do NOT get an offer there, don't beat yourself up over it. You just don't know what that professor/program is looking for: Spanish-speaking applicants, minority applicants, someone who really wants to go into neuropsych, etc. It doesn't mean they didn't like you or that you bombed.
Furthermore, remember that just like the "real world," admissions CAN be political in some cases. I think it's easy to want to disregard this and hope that they're looking at everyone evenly, but that's simply not true sometimes. One of the applicants could be a current RA in the lab, have past work experience with the POI, or have professional connections with one or more of the faculty in the program through a boss/professor/etc. While this probably doesn't guarantee them a spot, it does provide them with an edge over applicants who do not have any connections at all.