Hi, Thanks for your positive feedback.

Yes, there are other brands that use a virtual boundary, however the cost will be more, like for like, than the Luba (Mammotion).

Kress - https://www.kress.com/en-us/rtkn-without-boundary-wire/
Husqvarna - https://www.husqvarna.com/uk/robotic-lawn-mowers/?art_717_sm=Virtual
STIGA - https://www.stiga.com/uk/stiga-autonomous-robot-lawn-mowers
Segway - https://navimow.segway.com/us/

I will be doing a review of the Luba 2 AWD 5000 very soon.

Thanks
Mark