People here are saying they love this update - but I'm less than thrilled.
Yes, folders and app-switching are nice but there are problems and some omissions that are perplexing.
First of all the orientation-lock to mute switch change. A poor idea to begin with (why in earth do we need a switch for this, when holding volume-down key for 2 seconds already does it??). Secondly, and even more infuriating is that the "new" mute switch DOESN'T EVEN WORK. Try it - flick the switch. Is your volume muted? Nope.
Next - the mobile app store is STILL painful to use. "Genius" recommended apps all show up as 5-star rated. Laughable. "Not interested" button STILL does absolutely nothing. Wouldn't it be nice to be able to add apps to a wishlist from the mobile store? Maybe - but Apple apparently doesn't deem it useful.
The keyboard (groan). Ok Apple is touting that they included like a bazillion new keyboards in this release. That's great, but how bout something truly useful, like ARROW keys for cursor positioning. You know the deal - when you tap in the middle of the word somewhere to add or delete characters, and the device won't let you get there without a bunch of manual backspacing. Again, apparently not important from Apple's perspective.
Airprint. Apple decided to make deals with HP, to allow for limited functionality with specific printers only. Objective: added profits for Apple at the expense of the user. Enough said.
There are others, but these are the main issues I find so far. If you're fine with all these glaring issues, then enjoy the app-switching and the folders (2 of the 100+ added features touted by Apple that are actually worth the update).