I ran GW at both 5mg and 10mg and don't really rate it. I ran 3 weeks of 5mg followed by 2 weeks of 10mg. During the first couple of weeks I lost weight but this was more water weight as GW has a strong diuretic effect. I was on eating below maintenance so I did lose fat but it wasn't noticeably more fat that I have lost during previous cuts without GW. It's not something I would use again.