We have stayed at the MGM Signature several times now as we come to a convention every year in Vegas and love it. This suite was situated in Tower 1 which was ideal as it's close to the casino and convention center.
Upon arrival we checked in a the front desk, however, they did not have our name on the reservation. I called Peter and he answered right away and after some back and forth we were able to solve the problem.
The suite was clean and the layout is great. This particular suite didn't come with glasses, silverware, etc but you could order it. We didn't realize this until we went to make breakfast, I would recommend requesting this when you arrive.
One perk is this suite did have maid service (some don't) and we really enjoyed that as it's always nice to get fresh towels on a longer trip.
It is a corner suite that faces the airport so there is some air traffic noise if you want to open the balcony door.