I bought a copy of Microsoft's Multiplan around 1985. It didn't have all the bells and whistles that any version of Excel has or had, but it worked. And it did everything that MS said without any issues. Then I bought Excel when MS "upgraded" Multiplan to Excel. And over the years I bought several copies of Excel, finally getting Excel 2011. Before that I had Excel 2004 and was happy with that. Now I find that Excel 2011 crashes on a daily basis, won't upgrade spreadsheets that MS said that it should have, and does all kinds of weird things. This makes my use of Excel 2011 every day, torture. Either MS isn't hiring the programmers that it used to a la Multiplan and Excel 2004, or all the evolutions of Excel 2011 have definitely tolled the bell for this program. I use of some Excel 2011's features, so I have no choice but to bear with MS as far as 2011 is concerned. But buy Excel again...NEVER.