No vehicle is perfectly designed but I'm very pleased with the Clarity overall. Further, with GM dropping out of the PHEV market, it's the only game around in the 40+ mile EV range (other than pure electrics, of course).
Some of the criticisms listed in the other discussions are valid, but not deal breakers in my mind. Also, I find the door handle difficult to reach from the driver's seat, and cupholder location seems awkward.
I appreciate having a vehicle I can drive on pure electric 80+% of the time but don't have to have separate vehicle when I want to go on a trip longer than the range of a pure electric.