A couple of years ago my power went off while I was on holiday. It was still off when I got home and looking at what had recorded from the TV I knew it had been off about six days so everything had to go. My excess on the insurance meant I couldn't claim for anything and as both freezers were uprights, the leakage into the horrible 'flowtex' carpet smelt terrible. After soaking up the worst with old towels I had to keep the back door open during the day for quite a while to dry everything out and get rid of the smell! In the end I never put one of the freezers back on as I realised I was storing stuff I'd long since forgotten, and lots of old bread and other low value stuff. I now shop more carefully and plan better and I must have saved a fortune in electricity by only having the fridge freezer on and not the small stand alone freezer.
Recently I accidentally left the door ajar overnight but I shut it as soon as I noticed and although things were a bit soft they hadn't completely thawed so I kept everything and so far so good - no illness, just slightly altered texture in the re-frozen icecreams, all gone now though!