When I first bought my Clarity I was obsessive about driving as efficiently as possible with no ICE, so I used Eco mode, except switching to Sport if I needed to merge on a highway or needed fast acceleration. I also like one pedal regenerative driving, along with occasional swift acceleration. Now that I’m a seasoned 2k mile owner, I’ve switched to using Sport mode, all the time. Here’s why: -I still get the same battery range as long as I don’t drive too aggressively -I don’t have trouble with unexpected ICE operation, as long as I accelerate within the blue line area. I rarely accidentally turn on the ICE, and I’m getting better at it never turning on -I have the full range of acceleration available, without having to search for a button in case I need speed suddenly -I turn on regeneration and it stays on. One pedal driving is the best, especially since my previous car was a stick shift and I downshifted going downhill or to slow down a lot As I said, if you avoid jackrabbit starts, sport mode is just as efficient as Eco. Anyone else like Sport all the time?