I fixed the link for you.
Not sure how he gained that increase in erect length other than a pure miracle/anomaly of a case... maybe the implant forcefully stretched out his skin that otherwise wasn't being utilized, I don't know. However, the vast majority of reports over at
PhalloBoards 2.0
AND the Elist subReddit indicate erect length being virtually unchanged, or even shortened. This tells you how anomalous his purported length gains are.
The Penuma Implant remains a very risky proposition, and heck, Dr. Elist (creator of this device) is potentially facing the loss of his Medical License which the Board of Medicine of California are reviewing now. Rigid silicone implants are super artificial, it's like having a dildo as a dick. There are countless reports of men who face serious complications from this type of procedure, which can be found at the PhalloBoards 2.0 link above and over at a Penuma Complications subReddit.
Obviously no procedure is without risk, but some come with a severity I consider unacceptable. You don't think these Penuma Doctors wouldn't pay me handsomely to delete bad reviews and bring them on as Sponsors? I could probably afford a Lambo with what I suspect they'd be willing to pay, even if it is just speculation. I wouldn't do it of course, I sincerely care what is presented to my readership. Suffice it to say, I've seen and read enough to know that the procedure itself is inherently flawed, and so no amount of refining or innovating will fix the problems that seem to occur over and over again.
My biggest concern with Penuma is how its long-term damage to unsuspecting men will have a very serious and negative impact on the direction of medical male enhancement. If the medical community as a whole only hears about the complications and botcheries, it will be hard to incentivize future Clinics from improving on what DOES work.
If you're reading this and are still on the fence about Penuma, go ahead and scratch it off your list. There are so many more effective and proven ways of increasing size, no need to consider something so obsolete.