When we moved to suburban Camberwell from inner-urban St Kilda we went from a patch of lawn about 3m x 3m that could be done with an old push mechanical mower to a lot more lawn that couldn't.
We're planning to lose a lot of the lawn for beds etc (possums allowing) but in the interests of good neighbourly relations we need to keep what we've got mown.
I grew up on a farm with an older brother who lives for high-powered internal combustion driven machines so at age 10 I was happily pushing a Briggs and Stratton slasher around what we used to refer to as lawn. (Which was primarily the grassy bits near the house that the animals hadn't eaten.)
Unlike my brother I find IC engines a pain so when we decided to get a lawnmower I was very interested in getting an electric. If you're on one of the green power schemes there's another benefit with the electric models in that there's vastly reduced greenhouse emissions.
You can buy machines that have a rechargable battery or you can buy cord powered units. The battery models were hundreds of dollars but the Ozito I bought was only $100. Having just taken on a mortgage the $100 unit was the choice de jour.
A few things:
a/ Having the cord is a pain. You have to be careful - very careful! - not to cut it. So you're always swinging it about, moving it out of teh way etc. And you have to make sure that the cord doesn't unplug from the mower so you have to find a way to arrange the cord in such a manner that it's not pulling on the mower's plug.
b/ It's only a relatively small engine (1 kW or about 1.3HP from memory) so it will have trouble tackling longer grass. And it will get blocked up around the blades and the blade housing in longer, lusher grass. But to be fair I don't think that it's designed for bigger mowing jobs.
c/ The manufacturers in my opinion haven't done such a hot job on designing the wheel attachments. I find that if I pull the mower backwards a lot the wheels eventually fall off and have to be screwed back on again. Screwing them back on isn't a big job but it's a nuisance.
The good points from our perspective are that it's fairly quiet, it does the job on our 8000sf as long as we don't let the grass get away from us and it was only $100.