It is completely redesigned, so the cloud storage service fits better into the interface of iOS 7 now. You are able to import all your files in the cloud. Also, you can share them easily, support for viewing PDF annotations and there is a powerful search tool, where you're able to find specific files and words. Here's how to get the 50GB of free cloud storage:
Grab Your 50GB of Free StorageStep one: If you don't already have a free, personal Box account, sign up for one. If you do, move on to the next step.
Step two: Install the Box app for iOS (download link below), then sign into your newly created account. If it's already installed, you'll need to sign out of your account (within the app), then sign back in.
Step three: You'll receive an e-mail confirming that your account has been upgraded to 50GB. Make sure to click the confirmation link within that e-mail.
Well, that's it! More about the app; the service supports over 100 different file formats and also lets you watch offline eg PDFs and PowerPoints. A high level of encryption ensures that the files at any time be safe, although it is advisable to not upload private information to the cloud.
Users also report that after the update the service operate a lot of faster and smoother, so it's definitely worth to download.
DownloadBox for iPhone and iPad (free, iOS6+, universal)
Box for Android