I tested and demo'd the product a few weeks ago. At $85 for the large kit you are paying for the convenience of drying in 10 seconds Vs. regular epoxy. It does make for nice flies, as Pete has shown above. It is difficult to calculate how many flies one would get from the 30 CC of Core material, but my guess is the it would increase the cost Vs. regular 5 minute Epoxy. So how much is convenience worth?, a lot, to me, when I'm making several doz. flies at a time, otherwise follow Penguin's advice!
Pete AKA Frenchcreek from Calgary