One thing that I've really enjoyed about Sync is how good it is at restoring its own state. I don't think I can ever remember a time where I went back to open Sync, and it wasn't where I expected it to be.

I swear it also just seems to know when its a good time to actually reset its state, and take me back to the home screen. Logically I know that Sync doesn't have machine learning capabilities built-in to "guestimate" this and is probably just a state-cache invalidation timer (or something along those lines)... but it certainly does feel like some dark magic!