The mova 1000 is quite at ease with its good wheels. I have a very difficult U-shaped garden around my house, with slopes, holes, shrubs and unmown areas for biodiversity, and no particular problems.
To mow, it's >1.5m long, but to pass, unless I'm mistaken, 60-70cm is enough.

I had a Segway i105 that struggled on a narrow path with a 30% gradient despite the 4x4 wheels (with a 90° angle to complicate matters). The mova 600 climbs and descends without any problem after several tests!

I don't know, as I don't have any tight spots or inclines, but I'm sure that's not a problem. Otherwise, there are lots of YouTube videos about it.