@CodyDog, a couple of my customers have earlier Evelo bike models that are still going strong. They all like the NuVinci systems for it's ease of use and the decent torque of the mid drive motor. With the new Bafang mid drive (I have retrofitted one of my own bikes with a BBS02 kit) she will have plenty of power to handle hills.
Court reviewed the
2017 version of the Delta with this integrated mid drive which may give you some more info.
I'm also going to move this thread to the Evelo forum where you may get more feedback.