Does anyone use a Laura Mercier primer, if so which one, there seem to be lots!! 
I am in my 40s with reasonably good skin, (not too oily/dry) I just want a decent primer to keep makeup on longer! Smash box, Pore Professional etc (silicone rubbery) primers don't agree with me though. LM is a good brand so though I'd try one of those.
Any recommendations?! Thanks 