Had a chance to ride one of these for a few hours on a demo day last weekend and it was fantastic.
I was short on time - the Bullit I was signed up to ride for a couple of hours had issues after only 30 mins/400m of elevation and one descent so I went back and they put me on the Vala (what a shame!).
I managed to get about 1300m of elevation in about 1hr 30, riding it straight up the most direct routes I could find in turbo and giving it a good go on the way down too. I brought it back to them with half a bar of battery left. Would be interested to try it out for a longer time and seeing what you could get out of it on a longer ride with it in trail/eco etc when you're not in a rush. Also would be interesting to see how it goes with the range extender.
Compared to the one run I did on the Bullit before it died, I went back up and started with the same track for a good comparison and it felt extremely composed, very quiet and smooth and those new schwalbe radial tyres definitely make a difference.
Standover clearance felt much lower on the Vala which was nice and confidence inspiring.