For those who don't already know, La Roche Posay is a french dermatological range specialising in sensitive skin. The Effaclar range of skincare products specialises in spot-prone skin, particularly for clogged pores and oily skin.
La Roche Posay say that Effaclar M will restore skins natural balance, whilst moisturising the skin and over time reducing the size and appearance of pores, creating a mattifying effect on the skin.
The retail price in Boots is £13.50, which I think is quite expensive, but I did buy it while the range was on offer for 2 for £15 so not as bad! However, once you've used this, the price is pretty much justified. After three weeks of use, my skin is much less oily, also the large pores around my nose do seem to be reduced, which I've never experienced from using other products which claim to target these problems.
Also, as I have sensitive skin, this has been really gentle and I haven't had a reaction from using it. I do think though that unless you have oily skin, this wouldn't work well under your make up as it can make some foundation seem cakey, and I think you'd need a proper primer over the top. It is also recommended to use for day and night, but I still prefer to use a heavier night serum or cream as even though my skin is oily, the parts on my forehead and cheeks get really dry, and need something extra.
All in all, if you have oily, problem skin that still needs a daily moisturising I would definitely recommend this product. A little does go a long way as you only need one pump and it's enough for one use.