They're not entirely all they're cracked up to be, to be honest. For large expanses of grass they're fine, but once you have any fiddly bits you end up having to use a normal mower to tidy up. Our first ride-on pretty much shook itself to pieces, so we took the cutting deck off and used it to drag a small trailer around until it finally gave up the ghost. The current one has been welded up more than once, though that may in part be due to my father-in-law rolling it several times.
I do most of my major mowing with a four foot topper on the mini tractor. That will quite happily mow small trees. It's even more awkward around "wiggly bits" though. We also have a Hayter rotary mower that must be about fifty years old and is still going strong(-ish). It's been through a number of engines and the main deck is mostly rivets and steel patches, but it just won't die
James