Remember, people come to forums to complain or look for answers, negative stuff tends to get the most attention. When the car is working correctly, fewer people will say so.
I love the Clarity, it is a great car.
Some facts about mine:
1. HVAC fan made clicking noise, replaced under warranty
2. When battery is depleted the engine sometimes revs at high RPM for a short time. Buzzing sound, it isn't a fault really.
3. A vast majority of the time the car drives nicely, even on gas. I have 10,000 miles on mine, about 100 gallons of gas.
4. I get 33 to 45 mpg on gas at real highway speeds, for a 4000 pound large car this is amazing.
5. I have saved over 400 gallons of gas vs driving my minivan
6. Range issue, if you know it is there it isn't a problem
7. Best highway car I have had.
8. Great in the city too, have seen electric range up to 67 miles in town.
9. So quiet, quality is excellent
10. Fit is mediocre, my panel fit is not very uniform and some badges were crooked. Not enough that I cared.
11. Replace "I" above with "my wife", it is really her car, but she tells me if there is something she doesn't like.
12. Would I buy one again? YES