I, like many other reviewers, read the bad reviews...

I, like many other reviewers, read the bad reviews and leased with 512 anyway. They seem to have a huge number of properties in Austin, so this may do no good, but I STRONGLY advise anyone reading this to rent with someone else.
I have no issues with my apartment itself nor with the maintenance staff.
I have MANY issues with the office workers and overall management. At the beginning, I had to sign my lease three times, both online and on paper, because apparently nobody in the office knows how to talk to each other.
The lack of privacy that many others have mentioned is insane. They enter my apartment all the time, sometimes with warning, sometimes without. From October-December 2017 they were entering my apartment multiple times a week most weeks. A few days ago I was leaving for work, didn't feel like picking up any so I checked my email and there was nothing (surprisingly) from 512 saying they'd be entering apartments. I checked my email again that afternoon and found that at 9:13 am they sent an email that said they would be entering every apartment in my building checking the HVAC systems starting at 10am. So that's a 47 minute warning sent after anyone with a 9-5 (for instance, me) was already gone and couldn't do anything about it. And sometimes they just show up with no warning at all.
Recently they emailed to see if I would be renewing my lease (and by the way they'd be raising my rent $35/month if I did). Then this month they switched rent services from a website that charged a $2 service fee to one that charges a $36 fee just for the privilege of paying my rent. I wouldn't re-sign with 512 if my life depended on it.