That is just a reseller on the Wal-Mart website, not really sold by them, just on their site. Pretty much overpriced junk. As Ravi said a bbshd build, or a radrover (if not comfortable with diy) would be much better options.
They also used to sell an eZip model if I remember correctly. My local REI has ebikes, but they are all on clearance for 50% off because they want to get rid of them. I haven't seen them at any other large brick and mortar store besides my LBS. Even my LBS has most of their on clearance to try and get rid of them to make room for newer models.