Yeah, it definitely made a significant difference in the "fullness" feeling... the quality is so much better. Of course it doesn't make it hang longer in a flacid state... that would require surgery. I guess all it does is loosen up the blood vessels to allow more blood in. It works great for me... and my girlfriend DEFINITELY notices a difference when she's riding me... it's a lot stiffer and lasts MUCH longer than it used to. I'm not saying it's a miracle pill or anything, but hell, it's pretty cheap compared to Viagra... and it does work.