I mostly use Ride Austin which has been reliable, but I've also used Fasten numerous times without an issue.
It is the wild west of TNCs right now in Austin, I'm curious to see who comes out on top. I'm just glad they popped up quickly after Uber/Lyft left.
https://medium.com/@CaseySoftware/mayor-steve-adler-is-scamm...
Uber and Lyft chose to leave Austin. You can argue endlessly why they were forced out, but somehow other services managed to pop up and make the business work.
Most of the things I cite were done after the Prop 1 vote. U+L screwed that up.. the City's behavior since has been ridiculous.
One of them included that TNCs can't stop in the middle of a busy road when picking up a rider. This is one thing I'm really glad got implemented because people have been seriously injured and killed[0] because TNCs stop in the middle of busy roads.
0: http://kxan.com/2016/04/28/woman-claims-lyft-driver-was-at-f...
http://www.bizjournals.com/austin/blog/techflash/2015/12/poi...
Yikes.