I was able to take a Karma for a short test drive.
Although the interior looks cramped, it was very comfortable and did not feel small at all. The car felt heavy, substantial, and solid. It was very fun to drive, with good low speed handeling, and decent acceleration. Brake blending with regen was done very well, it was seamless. The steering wheel was comfortable to hold with "fat" cross section, and the assist felt very smooth with good feedback during my low speed city drive.
Acceleration was good in both EV (Stealth) and Hybrid (sport) modes, with not a whole lot of difference between the two modes, but still noticeable. It does not launch off the line very strong, like the Model S does, but once moving acceleration is brisk. Not bad for a heavy car, but not up to Model S capability (I have only test driven the MSP). The engine was very smooth and quiet. Engine start and stop was imprecievable, even better than the Volt, which is very good.
I am not a fan of the Karma. I will save for the Model S or BlueStar instead. However, I was surprised at how nice a car it is, and can definately see the appeal to people fortunate enough to be able to easily afford it.
GSP