I'm personally not a big fan of Fix+ for a few reasons.
First, the name is deceptive. It's not a makeup fixative at all. It's mainly water and glycerine, which serves to hydrate your skin, but as far as that is concerned, the airaesol cans of evian water do the same thing.
I'm also not a fan of applying caffeine to my face, despite what some new studies are claiming. Caffeine does deteriorate the connective tissue of delicate skin.
If you wanted, you could make a caffeine-free version of this at home, with water, vitamin E, glycerine, green tea, and chamomile.