I have one of these, it cannot reliably follow the guide wires back to base so keeps running flat, and I have to carry it back to charge it. The supplier has replaced the mower, same problem. I"ve re-wired the garden and guide wires, same problem. The supplier says it's a common issue with this mower. It didn't occur with my previous model Husqvarna. I created this account just so I could correct this misleading review. It's important to be aware this mower is seriously faulty. For the price one would expect better. Husqvarna just keep saying 'oh there must be something in the ground confusing it'. I've spent hours digging and wandering around with a metal detector to find this mysterious 'something' but so far nothing :-(