Hi, has anyone used one of these or know of the product? Are they weak or strong? Is output as good as it states? Below is a link, thanks.
http://www.drsfostersmith.com/produ...&Ntx=mode+matchallpartial&Np=1&pc=1&N=0&Nty=1
http://www.drsfostersmith.com/produ...&Ntx=mode+matchallpartial&Np=1&pc=1&N=0&Nty=1