Specs are cool - looks to me like a Sanyo front hub motor which I don't think is terribly exciting. What looks like a rear hub motor is actually the battery and I would be leery of serious off road with either hub motor or battery pack. Tidal Force had some problems with some of their hub battery packs collapsing under harsh use.
Also, there are spelling issues in their description - lithium is misspelled. Unfortunately, doesn't create a lot of confidence when simple things like that happen.