Love the lawnmower in this video. I’ve had a go on it, it has a throttle and propels itself, you pretty much just guide it. Great for medium sized gardens. The thing may look pretty gnarly (the cassette blade looks like it’d make a bit of a mess of your extremities), but simply put together and easily maintained.
Check out this video, in which Helen replaces probably the most common lawnmower part to fail in the mower – the nylon gear. Not a problem if it does fail though, because they’re dirt cheap and easy to repair: