Moose, if your serious I'll do a litte research on the product, see if it's legit, or what problems it might present, from what I've read so far, seems it does cause a pressure drop in your feed system (Might be from the first generation models that had a presssue problem?)
Did some research, looks like a legit product, how effective it really is I could'nt say. If you check out this link, it has a report from U of W on tested conducted on the product.
RenewABILITY Energy, Inc.