@spino
There are a couple pilot studies out there and one larger scale study sponsored by Restorex so not a lot to go on. Both had a positive outcome. Keep in mind that the results of penile traction for a man who's tunica has contracted due to ED disuse or fibrosis is different when compared to a man using traction to stretch their healthy organ beyond what it was originally. Those studies tend to show mixed results. As a side note, Dr Patel told me there will be little gain in penile length recovery from traction therapy after 3 or 4 months of using the device.
https://www.trialx.com/clinical-trials/listings/320251/penile-lengthening-pre-penile-prosthesis/
https://pubmed.ncbi.nlm.nih.gov/21492409/