Currently on week 9 of stealth sus. I am loving life. Gains are starting to slow so as some have advised I am upping proteing. I don't think that there is any doubt as to the authenticity of this product. What I usually do is load three barrells. 2ccs in the first two and then 1cc in the third. Everyone has been saying stealth is overfilled, I have not seen this. Also, some of the oils color is different with the sus. some has a yellow hue, and other is clear. ? I was told it was just different oil. Anyway, I have had good luck. PM me for specifics if you want.