I'm not sure how I feel about this.
Things I love: Ideally, it's supposed to be make up that you can sleep in, being all natural and chemical-free and whatnot, which is super appealing for me since I'm a lazy bum and I fall asleep right away when I come home at night. I also like that you can just build it up and use it as a concealer instead of buying a matching one. And it photographs pretty well (i.e. it looks like skin, not paint. I'm looking at you, CoverGirl foundation. Grrrr.)
Things I'm unsure about: It's really...yellow? Maybe that's just the colour I'm using...and it seems cakey when I put it on. I'm not using a proper kabuki brush, but I figure a densely packed powder brush should do about the same, shouldn't it? Either way, it's just not applying evenly and it feels weird. I also think it might look weird in fluorescent light.
I'm thinking maybe it just feels weird putting it on, because I've been wearing it for about a month now and no one's told me skin looks weird...although would anyone actually be like "your foundation texture is off" to your face? Probably not. That said, I looked at some photos from times that I know I've worn it and it looks pretty good.
Verdict: Not bad, but I could find something better for me. I'm currently working on Korres Wild Rose foundation. Talk to me in a month!
PS: I actually tried this same product a few years ago (same thing happened, unfortunately) and the packaging has vastly improved. They've changed it so that you twist the filter closed until you hear a rather satisfying click (which becomes less satisfying the more you use it, but still no product spillage!).