Is H2 out of business? I know they were involved in a lawsuit from some idiots that were too close to a refrigerator full of it. Never heard what happened.
The H2 guys came to a buddy shoot where we used it to vaporize a minivan. ~250 yards was still too close imo.
I've been using Sonic Boom brand for the last couple of years since they were the lowest per pound price when I was shopping around. I like to buy during holiday sales and clearance times to get the best price. All have went off just fine, so I'm happy with them. Making your own using bulk mix is cheaper yet, but I haven't bothered with it.