I bought this to try as I was low on primer, generally like Rimmel products, and it was very cost friendly. I've been using it occasionally now just to use it up but I wasn't overly impressed with it. The texture reminded me like more of a lotion-like glue which I didn't really like the feel of and my skin didn't look any smoother once it was applied. I didn't notice my makeup lasting any better than when I don't apply primer, either.
However, it might not be the right match for my skin and could work well for other people so would be worth a try.
I use this product every time I put on my makeup and it defiantly allows my makeup to last ten time longer. Its a definite "go to" before put on any of my makeup.