I stayed in Top Trip Rental's 6th Street loft with 4 other friends in June of 2018. Top Trip Rentals manages numerous rental properties, and they are extremely well run and organized. Our contact, Cara, always responded quickly and thoroughly to all of our questions, which we really appreciated.
They made sure that we were aware that 6th St could be a bit louder at times (it didn't affect us) and provided snacks and bottled water, which was a nice touch. The location itself is excellent - right in the middle of the city with lots of bars within walking distance.
The parking pass for the attached garage cost an extra $80 for 3 nights, but with the loft being located right in the middle of downtown Austin, that's understandable. It also took us a bit of time to figure out the Roku TV, and since the wifi wasn't the fastest, the channels took a bit of time to load, but not a huge deal.
All in all, we had a great stay on 6th St. Thanks, Top Trip Rentals!