I've seen it and believe it is a Synta product? Their craft paints are sold in hobby stores and are alright for what they are I guess. I think this deck product is sold in box store type places and not paint stores which raises a red flag for me.
What are you trying to accomplish and how damaged is your deck? In looking at the website the product promises to fill 1/4" gaps, gouges and so forth. That claim would make me nervous.
Who knows though. Maybe others have experience with it and it is great stuff. Maybe the box stores made a mistake and stocked a decent product?
With anything new, I also test it first.......maybe you could buy a quart or a gallon & test it on a few boards or even some pressure treated scraps you have laying around. Let it weather for a year or two to see how well it performs.