u try it yet?
I've tried it several times with success. I can usually feel it in about 20 minutes, but it seems to be fully kicked in about the 1.5-2hr. mark. That's when you have a little to smoke.

I have been using some very strong weed and using a bout 1/10 - 1/8 of a gram per cracker and getting very stoned on 2, and wrecked on 3.

Not very expensive to experiment with, I would raise the intake a little if you have a high tolerance, mine is not real high right now.