A very quick note: the newest version of iOS, version 10, is out now, as of yesterday. (That’s the system that runs iPads and iPhones.) As far as I know, it’s not automatically updating yet, but it is giving you the option to update now if you want to.
iOS 10 looks good, but some people have been having trouble with the update not installing properly, which can leave you in a bit of a pickle, needing to do some fairly techie stuff to take the new version off and put the old version on – otherwise you’re left with an unusable device.
It sounds like most people are having no problems – but you don’t want to be one of the 1% or however many are left unable to use their iPad/iPhone.
My advice at the moment is to wait. I’m sure Apple are running round madly fixing this problem as I type, so it’s probably best to wait until it’s sorted. In a week or so might be better time to let the update run… or simply wait until Apple change it so it happens automatically.