I finally got out for a ride on the 4.0 a couple days ago, for the first time having the time and conditions to do the type of ride I'd been dreaming of when I got the bike. The conclusion: it was great!
My ride was a 50 mile loop utilizing 4 rail-trails and some miles of unpaved rural public roads. It was mostly flat, but the dirt roads had some rollers and a few typical hills of the short-but-steep variety. There were maybe 10 miles of pavement in there and the dirt roads were comparatively smooth as they can get pretty bad depending on how recently graded, etc. Since I'm retired and no longer in a hurry, I was out as always to just enjoy the ride and mostly cruised at 12-15mph except of course for the downhills.
My setting using Mission Control had Eco at a low 15/30, which proved to be exactly what I was looking for. I was looking to get the same type of "workout" as I'm used to with my regular hybrid on these roads, but with an increased range and some help for the hills or when I start to run out of gas. I found that in many of the flat, harder-surfaced sections, it felt pretty good to put the bike in the Off mode and go with pedal power. There's also one rail-trail that follows a creek downstream and has a constant 1-2% downgrade and I was able to fly along at 16-18mph with the motor off for several miles. I finished with an overall 12% average speed and 43% battery remaining. Not bad at all!
I also concluded that I have no need to go with a suspension seat post, as the bike was not much rougher than my regular bikes (~60psi in the tires) and I'm used to getting up on the pegs if need be. I'll also leave the fenders on since they're only annoying when small stones rattle around in them. Powerwise, the SL might work better for me with its lower weight, but I'd have to try that "Future Shock" gizmo on some of this stuff before I'm convinced it's even as good as the low-end forks on the Vado.
Right now, I'm back to being very happy with my choice!
Typical rail-trail:
Michigan dirt/gravel road:
Less-improved rail-trail:
Break for lunch at a trailhead: