I haven't tried much of a range of primers, but I do feel that this one is pretty good (especially considering the price.)
This primer is a light gel that feels very soft and smooth between your fingers and on the surface of your face. It seems to settle on the skin quite quickly, I usually give at least 5 minutes before applying foundation.
I have noticed that my skin looks significantly smoother and even when I use this primer as a base as opposed to no primer. In which case I can assume that it's effective in serving it's purpose.
Definitely recommend, even if you personally don't like it $12.99 is no great loss? (I actually picked this up from postie for $10, and will repurchase :D)
I've tried a few different primers and this one is definitely the cheapest. It does an alright job but is nothing amazing.
It applies easily but I do find I need to use more than I use with other primers as it settles into the skin pretty quickly so I need a good dollop to cover my whole face.
It does make my face feel incredibly smooth and my foundation applies really well on top of it. Unfortunately though I haven't really noticed it helping with the longevity of my foundation.
Not sure I will rush out and buy it again as it hasn't blown my mind, but it does the trick and is very affordable! So I may repurchase sometime in the future.