Well I have much more fun at trail parks on my Cube Stereo Hybrid than I do on my regular MTB.. I watched this video expecting the dedicated bike journos to shoot e-bikes down in flames. So the fact that they recognised their merits spoke volumes to me..
I've found that it took a few rides to modify my technique and get the most out of the bike..
Now I spend the same amount of time at the likes of Swinley Forest but rather than just doing the blue and the red then heading home with spent quads, I now lap the whole thing twice and go home having added a cerebral workout and with the whole of my body spent rather than just my quads!!
Or when at a more rugged venue like QE Park - after a particularly enjoyable section of descent I drop it onto the grannie cog and just pedal straight back up the fall-line and do the section again. (much to my mate's envy!!)
I've now convinced 3 riding mates to make the switch on the proviso that (having sold their regular bikes to fund it) we'll occasionally leave the batteries behind and pedal round manually.. Then, all being in the same boat, it wont matter that we're a few percent slower up the hills..
Though I know full well that they'll soon realise that it isn't 'cheating' having battery assist and that if you still put in your legwork it just allows you to cover twice the distance at twice the average speed - with all of the ride being fun, not just the downhill sections..