I've experimented with the SizeGenetics extender for some time now, and I can say with no bias that I haven't discovered any flaws with this product to this day.
Its padded rubber comfort strap makes the SizeGenetics extender definitely more comfortable (i.e. tolerable) than the standard silicone noose that most penis extenders have. Because of this, I was able to wear this product for longer periods to receive bigger gains. I have managed to achieve nearly 0.75 inches in B.P.E.L. (which is the acronym for bone pressed erect length, or penis length as measured from the pubic bone to the tip of the penis when the penis is erect) in the first 6 months of using it, through wearing this product for approximately 40 hours every week.
More importantly, the SizeGenetics product has the option for you to get it for free. Meaning, either the SizeGenetics extender works for you or not, you'll still be able to get a refund. The extender conforms to the safety standard of CE for class I medical device and is thus safe for your personal use. Additionally, consider the fact that the SizeGenetics product provides a number of helpful perks, such as a step-by-step PE exercises DVD, a sex guide DVD, along with an online access to a sexual techniques program (Lovecentria). These perks is sure to give you value for your money.
In conclusion, I am impressed with the size increase I am enjoying with the SizeGenetics product and will willingly recommend it to any PE advocate.
For a more comprehensive SizeGenetics Extender Review, and to see how it compares with other popular penis extenders, please visit PenisStretcherReview.com.