I own a push mower, but last summer we kept letting the grass get so long (2+ weeks will usually do it) that the push mower just couldn't cope and was completely ineffective... at which point I would head over to my neighbour's house and beg to borrow her electric mower.
I'm vowing now to manually mow every week to avoid the usage of a powered mower. Two weekends in a row and counting...
~ Lynn