Probably like many thousands of others I was taken in and updated my iPad3 to IOS 7. Didn't mind the new look and layout, once I re-learnt where everything was and how they'd shifted all the controls around. The biggest problem was again the battery drain. Used to be able to use it on and off all day and still have plenty left. 30 mins worth of checking e.mails and 15% down. Couple of hours later and the red warning was showing. Ridiculous. Not only that but the iPad now gets very warm. Always used to warm up a bit if I'd been using it for an hour or so but that seems to have got much much worse almost to the point of describing it as hot rather than warm. Am sure that's not helping the battery drain either. Read all the tips about reducing battery drain so have turned off as much as I think I need to, to still allow it to function ok. It has made some difference, but the heat problem remains.
Other problems:-
A completely scrambled photo collection with photos in the wrong albums, new albums created for panoramics and videos and photos actually missing. The title is there but the photos are from other albums. Have tried to cut/copy and paste but for some it just refuses.
Using Mail on the Home Screen to open emails has changed. If the incoming email contains images it no longer shows them, just an empty box. You have to scroll down to the very bottom and click "Load all Images" and I can't seem to find anyway to get it to do it automatically. However, using the full version via my ISP's site everything works as normal.
Know what you all mean about Apple's usual reply re: "not being aware of such a problem". Seems to be their stock excuse for things you've found that they haven't.