Like other posters, I too had flight issues at CLT and spent the night here (voucher courtesy of the airline).
My first impression was frustation - - as it seemed to take longer than expected for the hotel shuttle to arrive at the airport, to pick up all of us stranded passengers from various flights.
The hotel itself was fairly close to the airport, a short drive -- definitely not walkable. But upon entering, the interior looked clean and had a large open atrium area and warm colors througout (think reds, oranges, etc).
Check-in was alright, however no "perks" here for Marriott Reward Silver -- was what I was originally quoted. They do have a Club Lounge I learned later. Breakfast weekdays (i believe) at 6am.
The room was definitely larger than I was expecting. It was a 2-room suite with small refrigerator and microwave. Beds were comfortable for my 4-hr sleep.
Shuttle brought me back to CLT with fast and friendly service. The first shuttle in the morning leaves at 6am.
It was alright -- but room service closes at 11pm. And of course, I would've rather been at my destination than being stuck in a hotel.
**Oh and the large atrium area made me think that this property may have been previously an Embassy Suites or something. So I asked the shuttle driver, and he said that they've been open for 11 years. And that it has always been a Renaissance Suites.