Just came back from the San Antonio showing, man what a night. I was literally in the back though, like the backmost, left side of the theater. So I could only see 1/3rd of the screen, which didn't bother me anyways because I could still tell what was going on, and mainly I could still hear the symphony just fine.
Anyways, concert was great. I'll admit I had high expectations for what they were going to play, unfortunately I realized that it was unrealistic to play every single theme, but from what they played it was still amazing just to hear the live orchestrated versions. Also, I thought it was pretty lame for people to be laughing during the symphony. Sure there is some situational humor going on on screen but it kinda kills the mood.
I feel very fortunate, they said they added another piece to this (and i'm sure a few previous) concerts. I won't spoil it but it definitely cheered me up (that it felt like the concert was never going to end).
In the end, got my t-shirt and my poster ($35!), and I'm very fortunate to have the opportunity to witness such an amazing experience.
Also I got 50 streetpasses. I already have all the puzzles so I felt bad that I didn't have anything to do (other than that annoying secret quest of find mii 2).