This is a great place to live!! It's been about a year since we moved in, and we have had no trouble so far. The buildings and apartments are really nice: clean, well kept at a comfortable temperature, well lit and smells good too. It gives the aura of an expensive hotel :) The management is great: very friendly and professional. The location is convenient as well, walking distance to WC downtown and the Iron Horse trail.
If we need something to be fixed, it will get done in a couple of hours at most. We don't hear the neighbors through the walls or from upstairs...perhaps we have quiet neighbors. Occasionally, you can hear people walking on the corridor from above.
The only point to be concerned is parking. The security is good at towing out vehicles that don't belong in the parking lot. However, as long as you keep your parking tag visible, your vehicle will not be touched. There are plenty of spaces in the lot, our guests haven't had any trouble finding a spot the entire time.
All in all; we'll be living here as long as are in Walnut Creek.