With recent update to Firmware 2.52.22 I just noticed real nice Supercharger Live Status feature. If you touch the flag for one of the Superchargers in range (bright red), all the SC in range on the map display a little horizontal bar with as many slots as stalls at that location. The number of stalls currently in use are displayed in RED. Very nice. Perhaps this is old news, but I could not find it elsewhere.