Rafael's place suited our family well for our two weeks in Vegas. The kitchen was well equipped and had everything we needed to self cater and cook while we were there, including a fridge freezer with an ice maker. Although on a low floor in the building there are still good views of the mountains and horizon from the windows and balcony. Being able to access the outside and let in fresh air in the mornings was lovely and the balcony gets the morning sun. Most rooms I have stayed in before seal you in with no fresh air other than air conditioning. We paid $50 to have the apartment cleaned halfway through our stay which included new sheets and towels too. The pools also provide towels which you can take back to the room if needed.
There was some noise from the wet republic pool party during the day but we expected this as pointed out before we booked, but it didn't go on past 6pm and the kids easily slept through it during the afternoons.
The bed was very comfy and we slept well with little noise from outside the room. The hotel has complimentary laundry machines if you stay over 7 days and this was great to help keep our family in clean clothes. The pool at our tower was adult only but the pools for the other two towers are very close by, interlinked and very easy to access. The kids enjoyed them and the ones in the actual MGM Grand which is a short walk away through an internal connecting walkway.
We would recommend the MGM Signature and Rafael's place as some good to stay, especially if you need apartment style cooking facilities which aren't found in most Vegas hotels.