We are from Austin and so have a soft spot and big appetite for Tex Mex, including eating at the original Chuy's on Barton Creek many times.
This location leaves a lot to be desired, bar area is small, dining area smallest of any Chuy's we've ever been to, and the service can be horrendously slow and poor in general. The South Park location was so much better, but also a lot less busy even considering the Cowfish overflow people.
Still, I give this place 5 stars because the food never disappoints. My wife gets the same thing every time, Chicka-chicka Boom Boom. If you like chicken enchiladas and spicy sauce, this is the go-to dish esp with the hatch chile rice, that you can also sub with any meal.
I've ventured all over the menu, my favorite is the chile relleno with shredded chicken. Also the cornflake fried chicken is good, always the big as yo face burrito is a good choice esp if you are hungry.
Hopefully the service improves and the wait gets shorter, sometimes it is as long as 2 hours for a table of 5! You can always try the open seating at the bar. With the rest of Waverly slowly opening, I can only hope it improves.