Cogs inside the wheels that move the cutting blades are made of plastic. Mine broke down within one year of very light usage. I only have a tiny lawn behind the house. Avoid like the plague...

Bought the mower. 4 weeks later plastic tightening bolt broke. Height adjuster kept dropping to lowest setting whenever it started cutting so it gouged a hole in the lawn. This is on level easy cutting small piece of lawn.
Phoned Bosch. No refund and no repair - you have to return it to the shop for a repair. 5 weeks after the shop phoned Bosch they said no refund allowed and it cant be sent back and that they would send a rep. 5 weeks and nothing.
Bosch really dont care and the product is rubbish.
3 weeks ago I went to Bunnings and bought a Victor at a lower price. the quality is excellent. It does the job perfectly. And if I have a problem I could return it with no questions asked. Ive learnt a lesson in life!