I happened onto a copy of their stuff. As a toolset goes I much prefer the Nik Collection. With that said, Impression, Glow and Simplify have become a welcome set of chisels in my toolbox. They're really easy to overuse, but judicious application can really make an otherwise OK image pop, and using Simplify with the right layer blend mode can help define lines in your image that would otherwise only get pulled with an over-use of a structure or clarity slider that impacts things you don't want and cannot easily mask. I can easily live without them, but like I said, every tool in your box shouldn't be a hammer.
I haven't tried the Texture tool yet, but with the 35% off I may give that a shot - thanks for the code.