Smashbox Photo Finish Primer

As an oily-skinned girl, I'm forever looking for something to keep my skin matte as long as possible and banish the shine.  I always go for a matte finish foundation, at the moment it's Estee Lauder Double Wear and I set it with a mattifying powder: Seventeen Miracle Matte.  I tend to stay away from cream blushers and over-the-top highlighters because they just make me look greasy.

 Smashbox Photo Finish Primer (12 ml) - £12.50

Although it's a bit of a beauty sin, I'd actually never used a primer before trying this.  I have acne-prone skin, and was always under the impression that primer would block my pores and give me even more spots.  Now that my acne has calmed down I thought I'd better give one a go and after a lot of research, I went for the Smashbox Photo Finish primer.

There are two available sizes; 12 ml and 25 ml - I went to the smaller of the two so I could test it out before committing to a bigger bottle.  This oil-free primer promises to reduce the appearance of pores and fine lines.  It's a clear gel which applies really easily and provides a completely smooth, matte base to apply foundation on.  It definitely noticeably reduces visible pores and fine lines, I can see a difference straight after application.  Although by the end of the day my face is still pretty oily requiring me to still touch up my powder, my foundation stays in place so much better with this primer underneath.  When I get home from placement, my make-up hasn't budged and a quick powder over my T-zone does the trick, whereas usually half of my make up has disappeared.

Although I really like this primer, I'm still looking for something more mattifying.  I have very oily skin, so normal/combination skin would probably suit this better.  I didn't find it at all drying and it is comfortable and unnoticeable on the skin.  I'd love to hear your primer recommendations and any other tips for oily skin.