"Erection quality" refers to the strength, firmness, and ability of a man's penis to achieve and maintain an erect state during sexual activity. Full definition
It is important to take note, during the first month specially if you're doing it lightly just as me, you won't notice size gains, but the first thing you will notice is improvement in erection quality, and also in my case, I was able to improve performance as I was suffering from premature ejaculation. (menlify.com)
Pills are only for boosting erection quality, but it is dependent upon the quality of the pills. (drlenkravitz.com)
Included in my guide are a number of exercises and activities you can do to safely and naturally boost your body's testosterone production, which will lead to a stronger libido, improved sperm count and quality, as well as greater erection quality. (mistermanpower.net)