@Brannon 

RE: How do we know you download link is legit and not some kind of virus or whatever else it could be?

Good question! It does pay to be safe.

I suppose, though, the same as when you download other things from the internet.  As far as a virus, your virus checker will warn you if there is one (there isn't).  As far as the possibility that the excel file might be something else, you'll know when you try to use it and see that it isn't something else.