I had an interesting day of Clarity driving today. I have a little over 2k miles on the car, nearly all of which has been electric, so that's the personality of the car that I know and love. Today brought two different alternate experiences: the good and the bad of the ICE. 1) Since I was at 1/2 battery on a longer-than-battery-range drive this morning, I put the car into hybrid mode for ~15 highway miles. This is the longest I'd run in hybrid mode so far, and it worked great! I observed that the blue-to-white transition point on the power curve adjusts dynamically and the car was cycling the engine on during uphill stretches, off when coasting, but it was completely smooth, quiet, and not noticeable. Nice. 2) I didn't have time to recharge and was running a local errand tonight when I hit 0 EV range. Under this condition, the hybrid experience was far less nice. With the battery run down, even with fairly mild acceleration the engine would rev quite high. I don't know if this is "angry bees" level, but it's higher than I've heard before, and was loud enough to be significantly noticeable and distracting as it came and went (I didn't have any audio on at the time). Now I understand what people - and reviewers - complain about with driving when the battery is low. Can't imagine what I would have thought if the car I test drove had been in this state. My take-away from both of these experiences is absolutely consistent with what others have said: use hybrid mode anytime it's likely battery won't suffice, and turn it on well before hitting 0 EV range. There's nothing like having your own experience to make good advice sink in!