I bought one of these Bosch efforts based purely on the reviews on Amazon.
I was a bit worried because it’s so light and actually feels like a kiddies play lawnmower, but I have to say it’s brilliant. No problem with power and cuts through long grass easily, and because it’s so light it’s no problem not being self powered as you can just chuck it about. In fact cuts better than the neighbours 300 quid petrol effort that I was borrowing before, and so much easier.
Only issues are the smaller than average grass box because of it’s size and the 10m cable. Just drag the green bin onto the lawn so you can empty it in easily a few times. Extension cable solves problem 2. My lawn is 6m x 23m.