We loved our time in Mark's place in Las Vegas. The room is very big and comfortable with everything you could possibly hope for. Be aware that you will need to walk for a bit to get to the strip, but the payoff is one of the rarest things in Las Vegas - it's quiet!
As a bonus it is also very quick to get to the MGM monorail station. In effect this means that you can get to any venue north of the MGM very quickly. We weren't expecting this; it added even more value to the room.
Would we return? Absolutely!