Looks pretty cool, but WOW at the price. I thought I paid a lot for my Mountain Sun tank panniers, but these make mine look cheap! Personally, f you're looking for tank panniers, there are a slew of options, from TT to Aerostich, to Wolfman, to Mountain Sun, to Wal Mart. I absolutely love the MS ones and have had the Wolfman and Aerostich on the GSA as well and would still get the MS ones.
But if you've already fo the stuff that would attach to these, maybe not a bad idea? I actually could think of some dual purpose use if you tow a small DS bike and use the Smittybuilt GEAR stuff I think it is.