I really like the idea of this. I wish it had just a bit more SPF but probably better than not re-applying. I do like how it is broadspectrum. It has avobenzone which is a good broadspectrum agent. The other three ingredients listed don't adhere to skin easily so probably not good for people who sweat a lot would be my only concern. It doesn't contain any physical sunscreen so it shouldn't give you the white cast. I really hope they come out with a higher SPF.
EDIT haha nevermind, they have one with a higher SPF, although not a setting spray.
That awesome moment things you learned in school is actually relevant to life. WHOO.