Just that really. I have 2 iPads one is an IPad 1 and one is and iPad 3 gave the older one to my mum to use and after the latest update it's pretty much been rendered useless.
Most apps don't work. Safari cuts off, can't watch videos on FB etc. all after this update. I realise it's an older model, but I also think that I spent a not insubstantial amount of money on it only a few years ago and think its annoying that I'm being forced into buying a new one if I want to keep using an iPad. Think I'll be replacing with an android device.