SUPER close to the airport and rental car returns. They also offer a free shuttle to and from the airport. The guy at check-in actually remembered me from my trip there a couple of weeks prior. I've stayed in a king and double queen room, the king has more open space, but both were clean, with updated decor. I did notice that the king room only had a walk in shower, while the double queen had a bathtub/shower combo.
Amenities include an indoor pool and a nice gym that has a bike, 2 treadmills, an elliptical and free weights. I hot breakfast is served at 6am and don't forget the warm cookies they offer at check-in. They only downside is there aren't a lot of food options in the close vicinity (just a gas station next door), but there are some great options all within 5-7miles.
This is my go-to hotel for staying near the Charlotte airport.