A bit mixed
After reading reviews, I was uncertain of what to expect from this hotel. I was staying for a conference, and had been booked by my employer. I was pleasantly surprised to find myself in a nice, clean modern room. The public areas were nice. The concierge desk was very friendly and gave us great advice about getting around in Dallas. We ate in the restaurant and had a few drinks in the bar, and all of that was quite nice. 
I wasn't, however, hearing the same sorts of reviews from all of my coworkers. On the first night, one fellow opened his curtains only to have a pair of underwear fall out. The hotel practices conservation in housekeeping, so the sheets weren't changed during my stay, but it all looked ship shape when I came in each evening. I did notice that some crumbs I had left on the extra bed in my room were never swept off, but it was a very minor thing. 
After a couple of days, we did a tour of the different rooms in our party. It turns out that the rooms in the main part of the hotel were all pretty nice. The rooms in the Skyline tower were definitely a step down, and certainly not worth the rate we paid.
This hotel is located adjacent to Union Station, so it was really easy to catch the train to other parts of the city. Also within walking distance is the 6th Floor Museum and Dealey Plaza, as well as plenty of shop and restaurant options.