I previously carried Terratrike, and while I did not have any direct experience with their Bosch assisted Rambler EVO, I would guesstimate based on experience with many conversions I have done using mid drives at the crank on Terratrike Recumbents, you should be not have any issues at all climbing hills. Their Recumbents are usually all geared pretty low, and if they stuck with a 46T or lower front chain ring, you'll have plenty of assist from the Bosch. just be sure to downshift to lower gears when hills are steep, as you would with non electric. The Rambler is a very nicely built trike, with chromoly steel frame. Some people find the seat to be too narrow for them though, and on that model they dont offer their wide seat option. Assist on these Recumbent trikes is a blast ! With 3 wheels you can do some fun stuff into turns. Gotta be careful though. I've been able to get the rear end to slide sideways.
