VigRX Plus is currently the best male enhancement product that we have found for male enhancement and to increase penis size. It is an all natural herbal formula and customers claim above average results, more than any of the other male enhancement products that we've tested. Men also claim a boost in their ability to get and keep an erection and also how hard that erection gets. They have a 2-month satisfaction guarantee. Customer satisfaction is highest of all of the products that we've tested. It is also important to mention that VigRX Plus is the only male enhancement pill to successfully go through a human clinical trial with very positive results.