To herald in summer, I figured I'd do a sunscreen post!
I wear this over moisturizer and under makeup. It comes in a tube, which I really like; it's easy to squeeze out just the right amount, and I only use a pea-sized dot for my entire face. It rubs in easily and is foundation-colored, though I don't notice any sort of color on my face - it's pretty colorless once applied, and blends in really well. It *might* leave a whitish cast on darker skin tones, but I don't really think it will - it's not intended to provide a foundation-type coverage, so color-matching isn't important, and it doesn't leave behind a noticeable tint. It does smell of sunscreen, but well...it is sunscreen, and the scent fades very quickly - it's gone after a couple of minutes. The finish isn't greasy or drying or otherwise noticeable at all, really, and makeup layers well over it. I wear this in lieu of other primers, whether I wear makeup or not.
It's supposed to provide "broad-spectrum UVA/UVB sun-blocking ingredients" (via Sephora), which is another plus for me; it is important to use sunscreens that protect against both UVA and UVB rays (if you want a good overview of the two types of light and the differences between them, check out this post from The Skin Cancer Foundation).
This is a skincare essential for me, and I've repurchased it numerous times, though a tube does last a fairly long time, even with religious daily use. $18 for 1.4 oz at Sephora, Nordstrom, Macy's, or Clinque's website.