Last time I purchased US Cities and tried to use it with MegaScenery and Fsdt was with KLAS, and it was a pain in the rear. I ended up getting rid of US Cities for Las Vegas, and just sticking with MegaScenery and Fsdt. However, since US Cities for Los Angeles has a better rendition of other destination airports such as Bob Hope, Van Nuys, and Catalina Island, airports more geared towards executive jet flyers like myself, it's hard to ignore. I think I'm going to wait and see based on other users experience, to weight out the pros and cons before purchasing US Cities Los Angeles. I read the compatibility documents Aerosoft has put out, but only personal experience by users who have actually paid for this can convince me this time.