Personally, I have not been a fan of primers or even knew of their use until I was educated by a friend of mine. I was even more curious when Clinique launched their six new primers, and so I decided to visit the counter to ask about their primers. Their consultant recommended the colour correcting one for dullness in deeper shades. They have a selection for redness, dullness, discolouration, sallowness and a universal one which colour corrects for a range of complexion concerns. I have used this primer for nearly a month now, right after my morning skincare routine and so far, I have noted that my foundation does last longer and is even. You do however have to use quite a bit and in this day and age of cost saving that can be a concern. I must say, though, it is worth the money, and you do use less foundation so in the end you do end up saving. I will definitely be purchasing another one.