It really depends on the price you want to pay. The perks are good I think but you have to pay a LOT. I have done VIP and regular. It also depends on where you want to sit. At the MGM it is a smaller arena so most seats are good. Also on the day of the concert sometimes great seats get released for general admission. But it's a chance you have to take. 

Honestly? The casino holds so many good seats back for high rollers, that my advice scary as it may seem, I have done it since drowned world tour, is to wait till closer to the show. I have bought tickets for every tour in the days or even day before and gotten the best seats. I ended up on the runway for confessions tour and the corner of the projected stage for sticky and sweet. If you happen to be in a row that connects to the runway there is always a gap between the seat and the runway so if you hang out at the edge of runway everyone pours into that area at showtime it's like a mini pit