They definitely have some good foods, I've also used their sponge filters, including the 'active' ones, for instant cycling on fresh tanks.(I ran a test on this to see if it works, it does)
Steve is a great guy to do business with.
I prefer using microworms, but I hatch out bbs every day as well.
I've used the frozen bbs, I think they just hatch and freeze em, maybe inject some vitamins in there. All I know is with any kind of thawed food it will muck up the tank water in no time, so it's best to use very sparingly.
Ever tried using decapped brine shrimp eggs? I have a metric ton of this stuff and just use it when I don't have time to deal with live food.