This is awesome, except for one thing. As with all hybrid kits, you lose trunk space. Unfortunately, if I can't fit my groceries as well as the stroller for my daughter, it's out of the question. Obviously not everyone requires this, but how many commuters do you think never need the trunk space?

These batteries and controllers need to find another place. On the roof of the car, perhaps, unless you're an outdoor sports person and need racks for bikes or a kayak?