My boyfriend and I recently returned from a 4 night stay. Check-in was quick and we were given a wonderful room. We stayed on the club level floor and breakfast was good- just your bagels/cereal/coffee type of breakfast. The refrigerator in the lounge was mostly stocked so we had unlimited access to water and soda.
Our room was very clean. Bathroom was cool because the shower is separate from the bathtub and is fairly large. We ordered room service one night and it was fairly priced. Had to request small items throughout the stay and staff brought them quickly.
The location is great if you want to stay off the strip. The monorail is a very short walk away. We walked through several casino hotel lobbies and decided we were glad we picked the Renaissance because it is not as crowded. Check-in at a casino can apparently take up to an hour.
The gym was just OK. I found it hard to get a good spot to use free weights if there were others in the room. There's a lot of equipment in a small space. There was plenty of cardio equipment.
I used the pool two of the days and recommend that you get there early. It's in a tiny courtyard area just off the lobby, so it's surrounded by 4 high walls and only gets sun for a few hours. I noticed people started getting the good chairs around 10:30-11am. I recommend for those who wants to maximize sun time to get the chairs that are closest to the bathrooms. They get the most sun.
We had several wonderful meals in town: Gordon Biersch (brewing company and restaurant), Ah Sin (Paris), and Border Grill (Mandalay Bay). Also saw the show, Ka (MGM Grand) and liked that. We rented a car one day and drove to Mt. Charleston (approx 45 mins from town, but it didn't seem that far).

Stayed here for 1 night at beginning of trip after getting this hotel for a great deal on Priceline. We returned to Vegas at the end of our trip for one night. Hotel was very full then, so we had to book directly with the hotel rather than try to get it on Priceline, as I really wanted a non-smoking hotel. I was still very happy with the room even paying standard rates.

Location is quieter and easier to access than the hotels on the strip. Parking is easy and free. With a car, you are close to anywhere on the strip. Monorail is super convenient although it is expensive and not really worth it if you have more than one person in your group. Internet was not free unfortunately.

Off Strip but most suitable especially if you have a car. Location on Paradise Road means that you will not be affected by the traffic jams at the strip but yet able to get around rather effectively at the strip, parking at either MGM or Panet Hollywood.

No car, no problem as monorail is right across the street.

Classy lobby, lux rooms and bathrooms. Highly recommended for those whom want to stay at a non-Casino Hotel.

The king bed was very comfortable. The hotel was clean and organized. The hotel does a lot of meeting events/conferences, more than tourism. I noticed the meeting rooms were usually occupied even on weekend days.
The hotel is short walking distance to the monorail and the convention center. I took the monorail to the Strip casinos without having to get in my car. I loved not having to drive and park ast casinos. If you did you would have parking or valet fees. Cabs are expensive too. I love that you can buy a monorail ticket and use it as many times as you want within a time period. I would stay here again.