It was available to try at the NEC show, but I couldn’t be bothered to queue up to try it tbh. At 800g extra weight and pretty ugly it looks like something that might evolve into a decent product in time, but probably not anytime soon.
I emailed a couple of mates who are not members of this Forum and attached the link to the vid. Each of their reactions was negative and on the lines of "OK for a commuter bike, but for the trails, how boring!" My sentiments too.