3.5 Stars
I just got back from a business-related trip in San Antonio, TX, where I stayed at the Hilton Palacio Del Rio for 3 nights. Overall the rooms were comfortable and newly renovated and seemed pretty standard for most Hilton hotels. Cleanliness was overall acceptable although I did notice some mold and rust in the bathtub, which housekeeping took care of immediately on my request. Additionally, customer service was very good and the staff I encountered was very helpful. 
A few negatives:
1. Hotel was located on the Riverwalk, which was loud on the weekends and I wore ear plugs to bed one night when I had to get a good night's sleep. You can also hear the train honking as it passes every 15 or so minutes. 
2. The temperature in the rooms was a little difficult to gauge
3. The bathroom and the closet share a door...privacy is an issue
4. The room needed a little extra cleaning- but housekeeping accommodated my requests nicely. 
5. Riverwalk is pretty, but very touristy
6. Foodies- don't expect anything spectacular. The food on the Riverwalk is edible, but that's really about it. 
7. The bar does not have champagne or sparkling wine by the glass (tisk tisk).