I do a lot of smaller lawns and backyards that have some steps. I would imagine getting a ride-on in a backyard like that would be a difficult process. Most lawns are 20' x 20'. Not sure a ride-on would do much for me. I rarely do lawns bigger than 20' x 40'.
If the XT5 handles good on hills, I am sold. I have been using two used bluebird for 5 years. If I can muscle those around for 400 lawns every spring, the XT5 sounds like a huge improvement.