Product review (5 stars): This is a far superior product. The supplemental instructions provided by the seller ...
This product does exactly what it's supposed to do.  I purchased them when the minimal anchors used by our countertop installers failed after less than 3 years.  This is a far superior product.  The supplemental instructions provided by the seller were especially helpful.  Installation would be easiest on a new installation, rather than a replacement, but a little care makes it pretty straightforward.  You do need a set of clamps, which should be part of the description.  The brackets are very well made and the adhesive strips work very well.  Professional installers and DIY homeowners will appreciate this fine product.