I have just installed MS Excel over the weekend on my iPad and have a quick look at it. The interface looks very much like Office 2013. The basic functions are there. The next thing I look for is Pivot Table which is missing from the App. Table is available although I have not tried it yet and not sure if all the functions for Table are made available in the app. To save or/and work on any document, you will need to have a one drive account. I read that it requires Office365 subscription to use Excel. Come back for more updates as I continue to explore Excel for iPad.