I've lived in 3 different apartments in this complex throughout my college career, and there have been a lot of changes. Management (Amber) is the best - Amber, in particular, is always saying hi to all of the residents and making sure that we are doing well, and that no on has any problems. If there are, she is quick to address them. Parking used to be a huge issue, but in the last year I have seen orange slips on cars - warnings before they get towed, and I have seen cars towed.
Mgmt has been doing a lot more to ensure that the residents have places to park, and that we are safe. Now you can find at least a few spaces even late at night. As the other person mentioned, there has been a security guy driving around late at night, which is really reassuring.
The apartments are older, but everything works fine and maintenance here really is the best - fast and efficient. Not to mention friendly. I would live here forever, but I'm also happy to say I'll be buying my first home soon. I hope the next person who moves in will love Walnut Hills as much as I have!!