What are some alternatives?
When comparing iFile and Documents by Readdle, you can also consider the following products
Filza File Manager - Explore files and folders with list view or grid view. View / edit files with powerful viewers.
GoodReader - With GoodReader on your iPhone, iPod Touch or iPad, you can read virtually anything, anywhere.
FileApp - FileApp is an iPhone and iPad File System and Document Viewer.
Documents Pro 7 - The ultimate all-in-one mobile office suite for the iPhone and iPad with 8 premium apps in 1.
Decipher Backup Repair - Fix corrupt and buggy iPhone backups so that you can restore your backup in iTunes!
Files-finder edition - If you have to name one app which you miss most on your iPad, what would that be?