Good, not great
Perhaps it's on account of reading very high reviews here, but I was somewhat let down by Travaasa Austin.
I don't dispute that the property is beautiful -- the vistas as well as the grounds. But I thought there were a lot of kinks in the system. To start, we had a very difficult time finding the property when we arrived at Austin Airport at night. The property is located in a neighborhood filled with suburban subdivisions. There are no signs in sight and the road is not very well lighted. The hotel's website only provides a google maps link -- which really isn't enough if you're coming at night.
The room was tasteful but on the small side. Don't expect anything particularly memorable.
The food at the restaurant was very good. But the service could use work .The servers were absent and knew little about the menu (even asking basic questions). Same with the reception: I felt as though the staff was fine but no one went out of his/her way.
I didn't spend much time on activities as I was in Austin to visit friends, but I did go to one class (instructor showed up 20 minutes late) and also to the gym. The gym was fair -- what you'd expect to find at a Hilton or whatnot, hardly a full service gym.
In short, this was a decent place to stay on account of the grounds and views. But I wouldn't expect too much from the very high TripAdvisor rating.