Before this past Spring Break I hadn't been on a bicycle since fall of 2014, right before the big car accident. With my lung disease I'd go through a C-tank of oxygen within 15 miles of riding my Kona Nunu mtn bike on fairly flat ground with slight hills. Regardless, even with oxygen there was no hope of doing any riding in my hilly neighborhood at 6600 feet elevation, and especially no chance of making the 800 foot climb from the shopping center at the bottom of Cheyenne Mountain back up to my house (about 2.5 miles ride one way, with a grade ranging from 0 to 12% along the way).
So we recently bought a pair of Trek eBikes so that I could ride in around our neighborhood whenever feasible, and so that my wife could keep up with me on the steep hills with her own eBike when she has time to ride. I bought the 17.5" Powerfly 7 mountain bike, but the smallest women's mountain bike was much too tall for my wife and she had to get the 14" Neko+ trail/hybrid. I tested the XM700+ and the Dual Sport+ first, but they didn't fit me as well as this one (and the one I got is sweet on single tracks unlike the others).
The 29" tires roll over everything, and the Rock Shox Reba RL forks work great in combination with the Suntour NCX suspension seat post. The 203mm hydraulic front disk brakes are very impressive stoppers on fast downhill rides (up to 42.7mph so far), and the 75NM of torque lets me climb up very steep grades and trails.
The bikes are class-1 pedal assist-only (no throttle), using torque sensing at the crank to multiply our effort, but with no assist past 20mph. We keep the assist levels as low as possible for the best workout and longest battery range. My bike adds power to the amount that I put into the crank in 4 levels: adds 55% more, 120%, 210%, or 300% more (up to 250W continuous or 500W peak), and my oxygen requirement has been dramatically reduced. My wife's bike does 50%, 100%, and 200%.
Because of the mid-drive, the motor can benefit from the gear-set to make climbs easier. But because of the torque sensor, we still have to get some exercise in order to get the motor to help with climbs. On totally flat ground, any setting for assist makes pedaling effortless, which means I can leave my oxygen at home (not really true since my O2 sats drop to 85% just by walking).
Range in the lowest assist mode on the easiest terrain is about 15 miles per 1 bar of battery (out of 5), or as much as 75 miles. On the harder rides around our neighborhood it drops 1/5 bars of battery every 6-8 miles, so my range would be closer to 30-40 miles. But I haven't ridden far enough to drain it more than 3 bars.
I got an ECOhitch Invisi 1.25" hitch installed on my WRX (totally hidden behind the bumper) so we can take the bikes on a rack for holiday trips. We're going to Glenwood Springs CO this Memorial Day weekend, and we'll be able to ride the bike paths along the river in both directions. In the past we'd rent bikes and catch a shuttle to take us upriver so we could ride back downhill. Some parts would still be slightly uphill, and I'd need my oxygen despite the lower altitude. The plan is to ride out to the drop-off point and back, without needing the shuttle this time.
Here's a pic of my wife with both bikes, then me, and the car with rack and her bike. (phone camera lens makes wife look tiny and me look huge because she's farther away behind the bikes and I'm closer and in front). I'd like to upgrade the bike rack to a 1up (or a Kuat NV base) at some point, because it's quite difficult to lift a 43 and 46 pound eBike onto the current rack.