I purchased a set way back when.
Used them a couple times in my 143 Aire self bailer.
They work, but some how there was something about them I just did not like. I think it was the image of that aluminum rubbing on my raft floor and no matter what you do it will rub or at least it did for me.
So I went to a pair of the extra wide straps. Did a locking knot on the buckle end and arranged that so it was easy to adjust on the outside. Since my bars were close to a perfect fit for my cooler the cooler did not move at all. I could easily adjust how high or low I wanted the cooler above the bars.
For what it is worth, for me the extra wide 2 inch I think straps worked great and better than the aluminum setup which is somewhere in the spare parts box.
I also toyed with the idea of having Tuff River Stuff or Stitches'N Stuff make me a mesh basket setup as that works really good. But the strap setup was cheap, fast to set up and works really well for me.