This concert venue is fine. Nothing more or less than what you would expect. I've been to a bunch of shows here (mostly because of the wife) and yet I still see critical mistakes by patrons.
1. Why buy concert programs before the show? They're a big royal waste of $25 but if you must buy it, just get it afterwards. You have 3 hours of carrying that thing around and risk curling, crinkling or god forbid spilling something on it. This goes for t-shirts too unless you are buying x-small because the other sizes aren't running out anytime soon.
2. For all the ladies! Either get to the restroom as soon as the opening act is done or risk standing in a line for 30 minutes. You're better off just going 10 min before the headliner when there's never a line.
3. You're better off with 2 16 oz beers at $8 a pop than the 24 oz $11 ones. More beer per oz and less trips to the bar/waiting in line.
4. Park at NYNY and walk over if you live on the westside of LV. The traffic going into the garage from the west is ridiculous by Vegas standards. You also avoid all the exit traffic. Its not like the walk from the MGM garage to the arena is that much closer.
5. Don't think you're just going to just get a table at Seablue/Craftsteak/Shibuya/Fiamma (ok..maybe Fiamma) before the show without a reservation! Make one!