I have still only taken a single dose, but it certainly had the intended effect. I was spontaneously rock hard for most of the first night, to the point of feeling that wonderful ache that I haven't had for decades. And I could still get plenty hard and keep it up on the 2nd and even 3rd night with only a very modest amount of stroking. That hasn't happened for quite some time.
But I wouldn't say that I've been transformed into the ultimate stud for at least two reasons:
1. At 66 I'm just not going to cum that much or that often, no matter how many erections I get. And my wife seem satisfied fucking about twice a week. So I spent much of nights 2 and 3 just laying in bed and gently edging, enjoying the sensation.
2. I've really conditioned myself into a cumplete cum craving sissy over the years. When I'm turned on, I feel a powerful urge to dress up en femme, find a local ABS, and suck off just as many guys as I possibly can, just like the good old days before my second marriage. I may need to back off to the 10 mg dose to keep from going nuts.