This is an exciting prospect for the price! That said, I'm somewhat skeptical how the hub drive motor will fare in tricky uphill terrain, in terms of torque. IMO, a mid-drive motor would be more ideal, but I won't fault them for bringing more options to market.
Just about any mid drive would undoubtedly be better than a hub motor, but even on my shitty, heavy EP2 Pro from ENGWE can climb OK on a 750w rear hub. Helps to pedal of course (especially on steeper hills), but it's still easier and faster to climb with (when powered) than my 21 speed hybrid. I would imagine this can get up most hills with a modest amount of effort even if mid drives beat it all day long.