Stayed at the Ritz-Carlton for two nights before a cruise. Taxi from the airport cost $25 (with tip). The hotel was situated in a rather quiet neighbourhood in Coconut Grove, not very much to see around there if you didn't have a car. CocoWalk with some shopping and restaurants was about 10 minutes walk away.
The hotel itself was very comfortable, with some beautiful rooms. I specially liked the lobby area with bar, you can get some reasonably priced snacks and lighter meals there. The pool area was almost empty every morning, no problems getting lounge chairs there.
Our room was comfortable with lots of pillows on the bed and posh Bvlgari-toiletries in the bathroom. Bathrobes were also a nice touch.
We ate breakfast at the hotel both mornings, not cheap but good food and polite service.
I would recommend this hotel for a relaxing stay away from the hustle and bustle of the South Beach area.

We had some concerns about the service due to reviews posted here. Our experience was stellar. The front desk was over the top. Particularly a young man named William. Friendly , bright, polite and very accomadating. We had a ball, and what a convenient location.

We stayed for one night after a cruise and had a wonderful experience.
The thing that stood out the most was the helpfulness of the staff.
We arrived very early, 10am, and they were able to find us a room so we didn't have to wonder around all day.
The room was very nice and the pool area above average.
I found the price to be reasonable for a hotel of this quality.
A definite hotel to recommend.

It's hard to criticize a Ritz, they are always some level of nice, but RCCG misses the mark a bit. Service felt a bit "green." The girl at the front desk who checked us in was borderline unprofessional. Definitely not polished. Not the typical RC over the top hospitality. Was at the pool about 6 hours without being asked if I needed/wanted anything. Usually at the Ritz they have someone going around handing out drinks, menus and sometimes even "freebies" like popsicles, etc. (my favorite).

Rooms were fine, typical. Only downside was you could not open doors or sit on the balcony because of all the street noise/construction going on outside.

Gym was fine, typical.

Property itself felt suffocating. Our room did not have a view of the water and no where on the property could I find a view of anything. High walls seem to surround the property and it's outdoor areas. It is what it is, hotel is not on the water, so views are going to be limited but I feel the hotel could work with this. The pool was stark. Lots of cement and no flowers/water features, anything to soften the coldness of the cement. Also, lots of street and construction noise at pool. Piped in music would have been nice.

Oh, and the food. Breakfast seemed less expensive than most RCs. Breakfast was not bad. Lunch prices were about the same as other RCs. Was VERY disapointed in the grilled fish sandwich. Dry, bland. awful.

I wasn't looking for South Beach but Coconut Grove is a little tired. Next time I'll go back to Key Biscayne RC.