They said they offer smaller tires and shorter stem for shorter riders. Just throwing out an lightweight alternative that will get you to work with little or as much work as you want. As far as the hub up hills im no expert. I never know the grades or how long, but North West Ga is pretty hilly...
It is short and I would prefer longer, I think they know there customer and when you're producing 50mph+ bikes something is bound to fail from let's just say adventurous users.
They have been around for awhile, not alot of reviews. Some positive thoughts from owners on endless sphere. Seems like quality parts with customization not much more you can ask for. People have their kits installed on alot bikes on YouTube. Probably my next bike between that and the luna...