I adored the Dr Jart waterfuse BB cream so had high hopes for the up tighten serum. I've mentioned many times on here that the main problem I have with my skin is large and very visible pores. When a product claims to help with this in some way it normally ends up in my basket. I'm yet to overcome the problem completely but this is helping. The Dr Jart + Up Tighten Serum helps tighten and refine pores and also helps to prevent the build up of impurities. The key pore tightening ingredients are sage and rosemary extract. It gives a nice matte finish which makes it a lovely serum to use in the morning as well as evening. I've really noticed a difference when using this - I did have a small breakout as I started with it but after a little perseverance my skin is less red and my pores are much less visible. It contains a little witch hazel too which I think is helping keep my spots under control right now. For £13 I think this is very good value as it does live up to it's claims and like most serum's a small amount goes a very long way.