Questions:Does SMM get sluggish when there's a lot going on behind the scenes CPU-wise? How does UI catch up with user actions? Does it suffer from frequent lags, or is it responsive enough? How large memory footprint does SMM take? Does it go into swap space once launched when no other app is running in the background? What happens when a phone call comes in while navigating? Does device catch-up quickly or is there that annoying "lock" when you *know* a phone call is coming yet UI is lagging behind? Is SMM minimized and on stand-by duing the phone call? Are voice directions also disabled? Does SMM come back automatically after hanging-up the call? Does it need to re-gain GPS lock? Is re-routing feature working fast and reliably? I've seen a video posted in one of the N900-related blogs (blame me, don't remember the URL) where author has put up a video of SMM really struggling to realize that driver has decided to take different route. Does that happen often? Did you/anyone try to calculate a long-distance trip, say UK-Poland, and see how SMM works then? Is there a significant difference performance-wise?