rendering excel files on the TAB is a breeze and even input of data is pretty simple. there should be a pre installed software that lets you do almost anything on your excel with ease. just click accept when prompted. i think the name of the software is quickoffice. the only different issue in entering data is that you will have to click on the formula bar after clicking on the desired cell so that the keyboard can kick in. after that, just enter data. take that ipad!
keep in mind that more complex formulas that were added to a ss in excel may not work on the various android apps.