HQ Hair. I wanted the one with the SPF in it but they'd sold out so I went for this instead. You get 51ml of product in the tube, and a little goes a long way, so in terms of value for money in this sense, it's pretty decent.
It has a light, not too runny, consistency, like a cross between a gel and a cream, and it goes on very easily. It smells a little bit like lavender, which personally I don't mind but I know some people won't like this. I smooth it on over my moisturiser. In terms of performance, I can't honestly say it's made much difference to my skin or make up longevity. It does give a nice smooth base for make up application but really not much better than my moisturiser on its own. Similarly, I'm not completely convinced that it does a decent job of making my skin less shiny and my make up stay in place. I'm currently using a mineral foundation - maybe it would do a better job with a liquid product?
I'm going to keep using it until it's gone, mainly because I paid £24 for it, but also because it's not doing any harm, but I have to say I was expecting a more noticeable performance from a Nars product. It's my first experience with a primer and it hasn't exactly put me off, but I do wonder if it's a step in my routine I can really do without.