I let the Navimow X3 mow my grass for months - here's why I haven't touched it since

• The Navimow X3 Series starts at $2,299 for the 0.5 acre capacity.
• This mower has some of the best navigation capabilities I've ever seen, it features ultra-fast charging, and has proven to be one of the most reliable and consistent mowers.
• It only ever had trouble with a low-lying solar panel on the grass, which is an understandable mistake.

Mowing my lawn is no easy task for a robot -- not because it's especially large, but because it's a challenging landscape. A few small hills and tree roots peeking out of the grass make getting around rather difficult for robot mowers. There are also some obstacles and no-go zones, including some well-defined garden beds (and others that aren't), some bushes, a deck, and a large hill. 

Also: The remote-controlled mower that's changed the way I cut grass is $400 off ...