I had it done early 2017. The reason is that my unit is small and I knew I wouldn’t get to average size girth via regular p.e. - mines only about 4”.
It worked for a while, and I gained somewhere around .3-.5 girth. It did seem to improve sex for me as it increased my contact area, but the surface of your erection is softer as it is a fairly soft facial filler - This could be a deal breaker for many I would think. And your glans stays the same size which does look a little odd.
After about 6 months though, I started developing granulomas (nasty hard lumps as an allergic reaction) and I had to make several expensive return trips (flights as not the same city) to have it dissolved. Apparently I was the first patient to have this problem at their clinic. A 1 in 1000 chance of happening so they say.
It is not as ‘instantly reversible’ as they claim, as it was a period of several months before it was gone. And I still have a couple small residual lumps that might take a couple years to go away fully. And I have excess skin as a result, thankfully on erection it doesn’t seem to matter but for flaccid it’s definitely noticeable.
As for the procedure, It was not as painless as they suggest but was not unbearable. I had to go in for a couple sessions and had something like 12 ml total.
I didn’t confess to my girlfriend that I’d done it until after the issues started cropping up. And she didn’t seem to have noticed any difference from before treatment, after treatment, or after correction . Thankfully I don’t think she really cares about the size of my dick :)