The base coat itself is fantastic. It helps polish last for any normal days of wear, or two and a half of remodeling and swimming in chlorinated water. Worth every penny.
I am a super fan of everything I've bought from Smith & Cult so far, except...
The lid on this bottle came apart the second time I used it. Not just the decorative part, but everything. To use it I have to pop the tiny nub that holds the brush off of the rim of the bottle. It's nearly impossible to use, and I'm sure as time goes on it will be harder to pop that part up.
Birchbox, of course, replaced it because they are awesome. Unfortunately, the replacement did the exact same thing. It has to just be a bad batch because I have three other Smith & Cult products that have not done this. Nonetheless, I would hope that the MOST EXPENSIVE nail polish I've ever purchased in my LIFE would not do this :-/