Usually I'm at about 14 blocks, sometimes 13 ~ depending on my activity level. Depending on what I'm eating determines how many blocks at a time. Never more than 3 at a time, but usually 1 or 2. I found if I eat say 3 or 4 blocks at a time (depending on what the "meal" is ~ ie; heavier-vs-lighter), I get very very full and I'm still hungry at the 3 hour mark anyway. Typically what I do is take a 3 or 4 block breakfast (eggs, oatmeal, strawberries, peanut butter, toast) and spread it out over the course of 4-5 hours. ~ 1 block upon waking, one block before workout, 2 blocks post workout.
About 2 years. I received my certification last year. I can't imagine eating any other way.
Are you thinking of converting?????