I have no personal experience with Luna, but a couple things to beware of that I've noticed:
1) The owner is a bit clueless about bicycles. I've watched a few Youtube videos that he's done, and when talking about his bikes, the guy often forgets what even basic components are called (the term "headsets", calling suspension forks "shocks", etc). Let's face it, if you can't even remember that stuff, then there's no way in hell you understand more complex things like suspension dynamics and geometry. He is clearly passionate though about high-output motors and electronics.
2) The company is going to give e-bikes a bad reputation. There appears to be a "gentleman's agreement" among the major e-bike/emtb motor manufacturers (Shimano, Yamaha, Bosch, and Brose) to limit motor output to ~250 watts continuous or 750 watts max, with no easy way to modify the motors/controllers to produce more. In other words, they clearly want to make sure that e-bikes stay compliant with existing and emerging public use laws and safety. Luna on the other hand seems to be pushing a bike that appears legal to be ridden on authorized trails, but clearly is easily modified to be otherwise (or just buy it souped up from the start).
I understand that there's a market for ebikes for "closed-course" or motorized trail use, but this has to be a very tiny portion of the overall market. They already sell the Sur-Ron for this market. It personally bothers me that they are offering this integrated (i.e., stealthy) bike in a high-output option, and with a throttle option, so more people can potentially poach trails that are designated only for Class I e-bikes. Keep in mind, I am someone who owns dual-sport/offroad motorcycles, and who sits on the libertarian end of political policy.