Stayed at the Renaissance Dallas for a week during a business trip. Lobby was nice. Check-in was a little slow but nothing to complain about. We checked in closer to 8 PM so perhaps the line had dwindled a bit. Rooms we fairly typical and straightforward. The hotel is shaped somewhat like an oval, so the size of the room seems to depend greatly on the room number you receive. I was put into a room close to the end of the hotel, so the room definitely felt cramped once inside. The lounge chair in the room was wedged between the wall and the nightstand and barely fir the space. Not a complaint as much as an observation. Everything else in the room was satisfactory.
There is quite a bit of construction currently going on outside of the hotel. It doesn't really get in the way of your stay but it is noticeable and some of the exits out of the hotel are non-passable. As a result you end up leaving the hotel by driving down a row of spaces meant for traffic coming the other way. Also of note is that the parking, while free, can be tight if you come back to the hotel later in the night. There are spots available but you will end up parked some distance from the lobby in what felt like an overfill lot. All in all I would stay here again as a I like the Marriott brand and try to keep my business consolidated. I have stayed across the street at the Marriott Suites and this hotel is far nicer. That said, this hotel seems right in the middle for the Renaissance brand.