Almost complete, but the most complete out there. I think Microsoft let them access some extra code, because they even have 5 buttons in the application bar, which is otherwise limited to 4. It's still not very useful to me, I can navigate just fine using apps that are there, and files other then music and pictures I store in skydrive. I guess I got used to it, file manager was a must on android before (mainly for installing apps from the internet - when purchasing apps was still a no-no in most countries).Pocket file manager is a complete file manager, give it a try