Pros: The blanks are very shaper friendly and I didn't feel itchy being covered in it. Occasionally I get foam dust in my eyes, but this stuff didn't burn or irritate my eyes like most foam dust does. It almost feels "clean."
Cons: The blanks are pretty soft, and I'm not sure how durable the blank is going to be with 6oz+4oz deck/4 oz bottom. We'll see. Even though the foam is soft, it seems to tear easily using a planer. I had to shape it with my Hitachi since the armature on my Skil 100 is at the shop getting re-wound. I'm not sure how the blank will shape with a slower RPM planer like the Skil.
The stock rocker for the 64F fish blank worked out ok shaping a 5'11" bat-tail, but I'll be sure to order my own rocker for the next one. Hopefully BioFoam will work out the kinks with their formula. I'd really like to see the industry move towards a more sustainable and eco-friendly alternative to the petroleum-based resins that make up most of the blanks out there today.
EDIT >>> I just learned from the folks at BioFoam that if you let the blank sit for 24 hours it hardens up again. I just checked my shaped blank and it cured up to the same hardness as my blue US Banks. I recommend giving these blanks a go. Let's support an industry that's moving towards sustainability and awareness. (Now for a plant-derived polyester resin...)
Here's some photos of a bat-tail quad I shaped for Michael S., my liason for BioFoam:
5'11" x 20.5" x 2-3/8"