I was intrigued by e.l.f. when some makeup artist acquaintances rolled down a list of their secret e.l.f. favorites, so I thought I'd start exploring by demo'ing some basics. I chose this $6 Primer in Clear to start, which was 30% off when I ordered it- wow. I must say: I was pleasantly surprised by this particular elf item. It has a very similar silky/satin-like consistency as some of my favorite primers, including GloMinerals Face Primer ($26) and Smashbox Photo-Finish ($36). This product also has a similar ingredient deck, though there are a couple of silica ingredients that some of the others lack. Interestingly, this product is gluten-free, while my favorites are not. It doesn't stay perfect for quite as long as some others, and lacks some of the anti-oxidants (like Vitamin E) that others have, but for $6- I didn't feel disappointed, necessarily.
So, if you're in the mood for a good gamble with not much at risk (besides maybe hour 12 of foundation perfection!) it might be a good one the next time you find yourself in need of primer.