I personally have never tried the products, but to me Tammy Taylor is the queen of marketing, she has loads of collections and colours and is constantly making tutorials, she is an expert in what she does and makes them look so easy which draws people to the products, but to me they seem a bit old fashioned.. No enhancement in this day and age should require something as harsh as a 100 grit file to "remove the shine" as part of the prep, where as a system that's much more technologically advanced such as CNDs retention+ system which only requires prep with a gentle 240 grit file and is also primer less which means the system has better adhesion properties.. You shouldn't even use a 100 grit on an enhancement except for debulking prior to removing (180 for refining after application), so to use that on the natural nail just makes me cringe! - so to me I get the impression that the products aren't of great quality on their own without needing to take extreme measures x