Everything is first class
I organized fundraising events at the Hilton as part of a conference going on next door at the George R Brown Convention Center. This hotel is visually stunning. Everyone was taken care of -- the valets and bellmen were always smiling, check ins were quick, and the rooms were clean and nice. 
The staff who organized the events were top-notch -- there was not a request too big or a detail too small that they did not take care of. Everything was flawless. I highly recommend this hotel and all of its wonderful staff.