Nice Facility, Disappointing Stay
This is a beautiful facility with a massive atrium containing a moving piece of artwork that is spectacular. So, what's the problem - just the little things. 
The atrium has a couple of bars and restaurants and the noise from this area carries right up to your room. Dies down around midnight, but on Sunday evening there was a noisy group at 3AM. This is not a quiet, restful place to stay. The AC just about drowns out the noise, but not quite.
Stopped by the concierge on Sunday and asked what we should not miss seeing in Dallas. She said "the Kennedy Museum," handed us five or six brochures and that was it. Just thought maybe there would be a little more conversation.
Costs are add-in. You have to pay to park on the massive grounds. 
Internet. Hilton Gold and Diamond get free internet, but a lowly Silver like me has to pay.
Sunday breakfast was a zoo. About a half hour wait for a table, then a 20 minute wait for the buffet.
Rooms are nice, but I will try another hotel next time I am in Dallas.