So we had booked 4 midweek nights at the Rio in October 2013. Dated decorations, old (cassette-playing) boom box-style radio. It looked like the room was designed in 1990 and never refurbished. Overall, a really nice room, with the only negative being that everything looked dated. Main bathroom had 2 sinks, toilet, shower and jet tub. From the living room, their was a door that led to the bedroom and main bathroom. The room had floor to ceiling windows and an awesome view of Vegas. The foyer led to the living room, with sofa, chairs, television, (very dated) radio, dining room table and small wet bar with a mini-fridge (not a mini-bar fridge, a regular fridge!) and a single cup Keurig coffee maker (!!!).
Our room had a double-door entrance, which opened to a small foyer area, with a guest bathroom. The room was at the very end of the very long hotel corridor, but it wasn't all that far really. You had to swipe your room key in the elevator to access our floor, which was cool.
The room was on the 20th (top) floor of the Impanema Tower. We were offered a 'Super Suite' for $100 per night, which was normally $400 per night. We had a COMP room from Caesars Total Rewards program, but it was a Studio Suite, so we asked about upgrading at checkin.