as with many products, the installation was a little tricker than described.  i used a paper trimmer (T-square will also work) and box cutters rather than scissors.  i also used a couple of pairs of tweezers to handle so as to maintain the "sticky" backing.  i also took care to line up the thicker "caulk side with the same when i had to "piece" tiles together.  altogether i was pleased with the product and the installation.