Actually I bought 4 grams 8 days ago and then purified it. After that process, I ended up with a little over 3.5 g of 98% pure material. I did a few lines the first day and then locked it up in my time lock safe unit the following Friday. Each day since then I started a sesh and did a line every half hour until 5 - 5:30 then relocked it up until. I slept great each night and had nice daytime sessions without getting too geeked out. I'm about to finish the last if it in the next hour. This is the first bag that I actually used a time lock safe. It's really nice because l've made this bag last over a week and my nose is in way better condition.