I grew up in that area. It is dirty, disgusting, the "nice" areas are either town that have populations of less than 3,000 or don't show up on the map. The closest I would move to ZLA would be this "nice" desert community called Juniper Hills. Also on the areas around ZLA, Valyermo (but other than a St. Andrew's Abbey there isn't much there) Llano, is a nice small rural community (and by rural I mean your place will probably be on 1+ miles of dirt road), and last, but most defiantly my favorite, Wrightwood, a beautiful resort community (Mt. High, for all those SoCal powder pounders), but the road is not nice driving to ZLA, and anyone runs the risk of getting snowed out of one's home suddenly.
ZLA does have a nice locality, 26.xx% currently, and is a level 12 facility, however, it is like a gang or a federal pen., two ways to leave, in a body bag, or cuffs. As far as how dirty and grimy the facility is.... I think the industrilogically polluted dirt outside the facility is cleaner... but I have only gone to visit, might have been housekeeping day, I don't recall.