Been running the free version for a couple of years now. No problems at all. I update and reboot it maybe once a month, or whenever there's a severe security update (that I don't miss). It's uneventful.
Same. I’ve been running it a little over 2 years for home/family services and it’s been entirely stable for me. I update slightly less often than parent comment, but have had zero issues from updates.
Likewise, have run it for years on a bunch of machines, never had a problem. I think I've got at least one that's been dist-upgraded all the way from a 4.x release to the current 7.0.