It depends on the dose you choose. It could be ONE monster trip (although that's a lot of volume to put into your stomache, and would be extremely intense no doubt). On the other hand, it could be as many as 8-10 fairly mild trips. Or anything in between. A good average is about 5 good trips for a 125g bag.

It depends on your sensitivity. Start with 15 or 20g. Then try say 40 or 50g. See what level of effects you like the most. Then it's like any other substance--it's up to you each time. I hear that some people have mid-range experiences on as little as 10g.

30g is good for me--30 is amazing!