The Good: this fabric is SO LIGHT. I've worn it hiking the Grand Canyon, and on a hot humid day trekking through a huge outdoor antique show--and the amount of airflow is amazing. I also love the cut, it works well for wearing a pack and although I'm fairly tall, the length is perfect. It doesn't cling to a hot sweaty torso either-- it's loose enough for complete comfort without looking sloppy (I'm 5'7", 135lbs, 36A and have tops in both size 6 and size 8 from Oiselle. I bought a small in this and the fit is great). I've gotten compliments on the Lapis/Crackle color too!
The Bad: this fabric is DELICATE! Amazingly, I have yet to get a pull in it from wearing outdoors (this is a small miracle), but I have a couple snags in the fabric from my fingernail catching it, and I noticed a few little holes after washing it the second time on a delicate setting, and inside a lingerie bag (how could this even happen?). And this was after reading others' reviews on the flow fabric, so I was being extremely careful with it.
I'd love to recommend this because it really does feel like wearing nothing, but don't know that I can because it's awfully expensive to get holes after the second wash :(. If it was significantly on sale I might buy again, but I'd have to resign myself to it getting pulls/snags/holes no matter how hard I try to keep it nice.