This is such a fantastic space! We rented these rooms for a friend's bachelorette party and it was perfect. The suite is two separate rooms, with keys that work for both rooms. We kept the larger room for hanging out all together and the smaller one for people who wanted to chill/take naps. The suite is at the far end of the MGM (maybe a 10 minute walk to the front lobby). We were able to eat and go dancing and hang out at the pool all on site.
It feels exactly like booking a hotel. When I arrived I checked in at the front desk of the Signature towers, and gave them the names of everyone else in my party so they could check in, too. There's a concierge and daily housekeeping.
They also let us deliver groceries to the building and provided us with all the kitchen stuff we needed to cook breakfast in the room, which was super convenient.