My urologist prescribed Caverject, because in his opinion it was the easiest to use and would usually give good results. The pre loaded syringe in the Caverject kit helped to make injection and amount less complicated. He was right about that.
I used it for a few months and had good results, however the downside was pain and discomfort. That pain caused me to look for a different answer. Whenever I used Caverject I found it necessary to use an icepack after to reduce the pain. I still have not had better results with the bi-mix, but the much lower cost and the freedom from pain make it my first choice now.
My doctor (to my surprise) said he had never had a patient actually be proactive enough to request a change to Bi-Mix. This surprised me, because this surgeon has done maybe a thousand DaVinci surgeries and is considered the preeminent prostate surgeon in our area. I like and respect him.
With the help of a knowledgable local compounding pharmacist, I was able to get a bi-mix that seems to work. I am only two weeks into this, but the pain after injection is gone. I now need to work out the correct injection amount.