"Little Things" add up poorly
DoubleTree's motto is "Where the little things mean everything." It was the little things that were the problem.
1. Phone didn't work
2. The select comfort airbed was totally deflated and remote was hidden. It wasn't advertised as an air bed and I had no idea what was going on! Maintenance had to come help me figure it out.
3. Ants in the room (ants are definitely 'little things')
4. Dirty carpet. I wouldn't do push ups or sit ups on this carpet.
5. Noisy from the street and from slamming doors. I was on the 4th floor.
6. I overcome noise by leaving the a/c blower on, but the fan didn't have a separate control. I had to leave it on outside air for the fan to stay on- fortunately it was temperate outside.
6. Bathtub drain plug was out indicating plumbing problems.
The staff was attentive and the food was ok, but all these 'little things' start to add up. If my wife or family had been along, it would have made it worse. For San Antonio, I think there are better hotel options. 
The DoubleTree chain is hit or miss because some hotels haven't updated. This one needs it.