Hip and good hotel
We stayed at the W at the beginning of May. It is expensive but used miles. The location is great if you want to be near the bars downtown and next to the lake. We had a view of the Congress bridge from our room but the bats weren't flying the nights we were there. The rooms are hip and comfortable. Eco showers mean you have to wait for hot water to come up but it eventually does. Room was quiet and wasn't really aware of other guests when in the room. Review of rooms alone is excellent. 
Pool area was well maintained and a nice space. Sat by pool during day and came back for drinks before dinner. Ate at restaurant in hotel one night. Was a quiet night and had a great late night supper outside. Did have to make our way through the young and beautiful on our way back to the room though. Austin has an L.A. vibe that is different from when I went to college there. The people from L.A. and those who like to think they are from L.A., hang out in this hotel. Not really my scene but can get away from it. Overall good experience. Would recommend.