Kev, I declined the injections and opted for muse pellets/ cream. In hindsight I wasted years messing about with the muse. It may take s bit of practice to get the injections right and i find stimulation is still key to a successful erection. Availability is an issue and many of us have problems getting supplies. I don't think the muse is available any more.
Kevin may come along and tell you about his experience.
Thanks Chris