As a returning racer and being pretty slow (now and back in the day) I think the display of the live "delta" to your current best lap is fantastic. You can instantly see if a new line, breaking point, etc is gaining or losing you laptime. Great for speeding up the learning process. Previous sims I have driven just give you sector time deltas which is limited information. There's lots more I really love about AMS but this is one small thing that can help make big improvements.