Hi,
yes, this is a really great piece of scenery. I'd mention another aspect: Performance. Unfortunately, I don't have a fast Quad Core, as suggested by the manual, but a 3 GHz Dual Core, which you may well call mediocre (albeit quite well FSX tuned, I think). However, I keep getting constant 15 fps over KLAX, at least in the default Cessna and in the Trike (just for sightseeing), which I'd call sufficient. This is with the suggested quite demanding settings. I have several (smaller and much less detailed) airports giving worse performances.
With respect to compatibility, I tried MegaScenery and the UTX/GEX combo. While I didn't detect any serious incompatibilities at a first glance in both cases, IMHO KLAX fits visually better to UTX/GEX, at least, as long as you are flying low. This notably refers to the colors, KLAX has quite vibrant colors, while MegaScenery is quite greyish. This may be a matter of taste, though.
Regards, Michael
Very well done, indeed.