I realize this is probably the wrong forum but no forum seemed to fit.

Should I spend the $110 and get the stand alone Excel 2013 from Microsoft themselves? I want Power Pivot. Or, do I just go buy a WalMart version from some other retailer for $60 to $80? Pros and cons of each approach?

Also, I'm hoping to install one on my PC and one on my laptop. I know MS was lenient in the past about such things. Are they still as lenient?

Thanks in advance.