I am a graduate student studying Computational Mathematics at UT.
For the price, Prapti's studio was the best value at SXSW. Everything was clean, there was more than enough room for two people, and she even left us orange juice and provided fresh towels. While it was a bit further from downtown than I would have preferred, it would have been impossible to get anything closer to accomodate two people without sharing a room with others for less than four times the price. With these things in mind, I'd highly recommend Prapti, especially if you're visiting Austin when options are limited.