Personally though I've never really had a problem with the previous updates it's all worked as it should do. This new update is a real 'game changer', a road map of new and exciting things to come. Apple have laid the foundations for a new build, one which I am sure will bring many new surprises!
One of my favorite part of the update is the ability to see what you have open at any time. Previously, a double tap of the home screen would show you App icon's only. Now, your treated to the current screen and the relating icon: much better!
Also, my battery life seems to of significantly improved since the update which is far from the norm! A faster, more responsive IOS has been born!
One thing that threw me initially - I couldn't find my Instagram App anywhere! The new search facility (gently pull down on home screen and a search box appears) confirmed it was still installed and gave me its folder location.
I soon came across another one of the updates new features: multiple apps in folders!
Overall a great update.