I used it several years ago. I was in the depths of unsolved ED related depression and would try anything.
It was interesting. I tried melanotan first. The flushing was manageable. Some queasiness. The tan was hard to explain in January. The erection quality was not there for performance purposes but during sleep the night of injection the erections seemed non stop.
The PT 141 was much better on sides, The erection response was similar. Neither gave me reliable on demand results. Both gave me numerous sporadic spontaneous erections throughout the night and day.
I stopped after speaking with my Dr. Who is a close friend and guiding my medical journey asked me to refrain until the drugs were tested more and got to a greater level of approval or at least a greater confidence of supplier.