Probably I'm not the 1st to post this, but on my Edge 500 I really miss the "Last Lap" data fields that were present on my Edge 305.
I was doing interval workouts yesterday, and it would be a great help if the "Last Lap Power" (or other parameters) could be viewed during your "recovery between intervals" ... then you'd know how the workout is proceeding, and how to adjust effort for next interval.
During a hard vO2max or Anaerobic interval , it's just too difficult and potentially unsafe to be looking down at the Edge.