We have a couple of the BBB's. They are great for getting to the tree stand, without picking up vehicle exhaust/ fuel smells. Very quiet, Scent-free and powerful. Very short run time... hills, snow, mud and extra weight make the run time shorter. The charge time is about 12 hours for a full charge, we can usually get about 2 miles out of a charge with older batteries and two people riding. I'm not sure what mileage someone could get with new batteries. New batteries are $$$ and they carry 8. I'm thinking they are about $200.00 per battery. 
They are definitely limited in their use...but mostly because of the limited battery use.
They are definitely limited in their use...but mostly because of the limited battery use.