Worst possible implementation it could possibly be – Microsoft Excel Review

If all you want to do with it is view your spreadsheet, it will work, sort of. That being said it’ll cost you 10 bucks a month if you want to be able to edit the file or save it locally for offline viewing. On top of that it doesn’t recognize existing MS Office accounts from PC, and it lacks even basic formatting features that you’d expect to use on a spreadsheet.
Review by Witch_Doc on Microsoft Excel.