Came here last night to see Soundgarden. This was actually my first time in the Hard Rock Hotel! I loved the ambiance!
After you make your way through the casino, The Joint, is in the back. Easy to get to, security was nice, and it was easy in and out.
We had general admission on the floor and there was plenty of room. I always get super hot at concerts and this one I felt really comfortable without getting too warm at all. Major points for good climate control!
I don't think you can get a bad "seat" or standing position in the place. The bar had lines but they went reasonably fast and the bartenders made good drinks.
I would definitely come back to see another concert!