I'm going to settle the score once and for all. I've seen results from every angle and every spatial perspective ever posted on this platform going back 15 years, more sporadic cases posted on other PE-related Forums, Physician Before & After Galleries (as well as patient & physician discussion), and of course my Private Message and Email boxes (also dating back well over a decade) -- and I'm not remotely convinced that Avanti Derma's approach yields any significant (much less negligible) difference with respect to overall gains & natural aesthetics.
This is true not just compared with Youthology but other Providers who offer PMMA like Shafer Clinic (NYC), Rejuvall (Atlanta), Dr. Sullivan (Florida), and Dr. Liu (Northern California), all of which may have subtle variations in their methodology since no single universal technique exists (i.e. no textbook on modern penis enlargement exists as far as I know). Worth noting, all of those I mentioned are gifted in their own way as far as injection technique is concerned, otherwise I wouldn't have brough them on board.
The premise as far as I understand it is that Avanti Derma has been notably risk-averse ever since they discontinued using Silikon1000 (in micro-droplet for small superficial areas of treatment for improved aesthetics), only to dismiss it altogether based on general cases from other questionable providers who used silicone oil in high volume in the penile shaft; while Avanti was not injecting silicone in these amounts, they joined alongside the network of PhalloBoards Sponsors to condemn its use in the penis altogether. I should note that I'm personally not against the use of what would amount to no more than 2-3 mL's/cc's via micro-droplet technique as recommended by the manufacturer as long as it was FDA-Approved Silikon1000, and was treating very surface level irregularities to give the shaft a more uniform look, and NOT 10, 20, or 30+ mL's/cc's for actual girth! At least that's my opinion, but I stand by the PhalloBoards
No-Silicone Zone policy nonetheless. I share this story to explain that Avanti Derma's underside-injection reluctance comes from a place of of overall risk & safety, and while other Providers have shown that it may not be a universally (much less common) complication with underside injections (example: urethral compression), it doesn't seem to translate into what I'd consider a major consideration ahead of what truly should be prioritized, which I'll share below:
Your best is to seek out the Provider who has a (1) good reputation ( PhalloBoards Sponsors
have been vetted and have a Public face on the Forums, holding them to a higher standard in an otherwise experimental field); [2] is most efficient logistically (travel, necessary excuses/alibis for work/etc; [3] caters to your specific goals within reason (if he promises you a literal eggplant of a dick, stay away); and [4] seems to impress you with their scope of professionalism, knowledge, and care, whether it is via consultation, reviews, or the initial procedure (since subsequent procedures are often inevitable if you have lofty goals). I personally think obtaining a good value is important as well, but the market has somewhat stabilized to between $5k-$10k for dermal injectables, and $10k-$20k+ for surgical implant procedures (namely dermal matrix grafts like Alloderm). This is why I think shopping for price is good, but should be used as a tie-breaker, not as a critical factor (penis enlargement is an elective procedure, a luxury, and a life-changing decision... don't cut corners with your one and only penis).