I strongly regret upgrading my iPhone 3GS to iOS 5. The phone became almost overwhelmingly laggy, from the unlock screen (when using the slide to unlock, I often don't see the sliding itself) to the music player (there is a noticeable lag when opening it) to even just typing (the key presses do register, but often there will be lag before what I have typed actually appears on the screen). Now I have an iPad 3 (or whatever Apple wants to call it now), and I know I should consider whether possible upgrades are worth slowing the entire system down. I'm not sure iOS 7 is worth upgrading to. I use my iPad mostly for productivity - reading multiple small PDFs and a few large books, consulting some apps, using Safari and a lot of writing. So far, the announced features of iOS 7 wouldn't help with any of that. Sure, the idea of using a parallax effect to show layers is nice, but it doesn't really help improve productivity. Changing how the user interface looks was an interesting idea, but to me it's mostly irrelevant since it appears to be an improvement in aesthetic only, not in functionality. I would strongly feel like upgrading if iOS had some useful features, such as a different system for selecting text or moving the cursor, more keyboard options, real multitasking to open two apps in the same screen (not "Infinity Blade 3" and the movie player, just a PDF reader and a note-taking app, this would greatly improve the iPad for me), and so on. Since some people here have been using iOS 7, I would like to ask: would it be worth upgrading from the point of view of someone focused on productivity? Is there any improvement in this aspect?