I sold my high performance MBZ and became green about 16 months ago. Living on a hill impacts the gas miles I get but I average about 35 mpg on regular gas. The car comfortably seats 5 adults. The design is pleasing to the eye. I got the model without the technology package but has one electric seat and a few minor extras ($25K) minus the $2300 rebate. The Altima drives better than the Camry hybrid without the clunky shifting from electricity to gas. Since gas prices have doubled since buying the car it was definitely worth the extra dollars over the gas only Altima models.
Less gas and it runs on regular. The interior is very roomy.
Figure out how to position battery to get more trunk space. Offer leather seats without the high end package. The cloth seats seem to stain easily.