I've been here on two occasions.
The first time it was outdoors-- it had to be since it was Dayglow and all the "paint" they use, but it was SO COLD on that autumn day. The sound was still good outside, and it wasn't too crowded. Wasn't old enough to drink yet, so I can't comment on the alcohol from their outdoor bar.
The second time was indoors for The Chainsmokers. It was completely sold out and way too crowded. Another cold day, and there they don't have a coat check. Thankfully the ubers and lyfts were pretty quick.
I can't comment on the bathrooms or alcohol from the bars in the back. And I haven't been up in the balcony either, but I was able to see that it was considerably less crowded than the pit for obvious reasons of not being close to the stage.
The security guards weren't jerks or anything from what I saw, so that's another good thing. They take their time to tell fence-hangers to not hang from the ledges, so I've seen some girls have enough time to snap a decent elevated picture/selfie from a ledge before a security guard sauntered by to tell them to get down. (You'll know what I'm talking about if you've been here.)
It's a typical concert venue with a intuitively designed interior structure (in the way that you can see the stage from wherever you're standing, as long as you're not right behind someone).