I have never heard of this product and, after reviewing the informatio presented on their website, am not impressed with the utility of the product. There is a surgical truism that no bleeding cannot be stopped with direct pressure. The advantage that a surgeon has is the ability to access internal organs.
That said, you and I cannot apply this powder to a ruptured spleen, we're not surgeons in the OR. If you can access a bleeding wound to apply the powder, you should be able to control the bleeding by other, simpler, means.
I suspect it is quite expensive, requires temperature and humidity conditions be met for stability, has an expiration date, and is potentially allergenic.
Granted, we are all kind of gadget freaks, but why spend your money on it?