I am glad someone started this thread, so I will add my experience to encourage others to not give up hope.
After my RRP surgery on Jan. 5, 2007, I have pretty much gone thru everything everyone else has written about. My surgeon told me at least 3 different times I could never have normal erections again after removing both nerve bundles. I used a VED for about a month with nothing to show for it, was ready to give up on it and then all of a sudden, I got an erection that was usuable. I then tried injections, PGE1 and Trimix 4 times and they gave me such pain I decided it was not worth it over the VED. From reading on this forum about the use of bimix to relieve the painful injections, I tried it and low and behold it worked. Thank you all for discussing this openly on this forum. I asked my urologist for Bimix, he normally would not have done this for his patients. He is a surgeon and not an expert on injection drugs. On May 12th, I was kind of messing around in the shower with my wife and low and behold, I got an erection that was useable without the aid of a VED or bimix. May 12th will be on our calendar as a very special day to celebrate the rebirth of "Willie". I have tried Viagra and Levetra several times since then and it is better than I could ever have hoped for. Alldaychemist sent me some samples after I inquired about Cialis (they cannot sell this in the USA). To sum all this up, don't give up hope. It took me 17 months. My wife has been most supportive, helpful and active in my many months of doing "penile exercises". She has keep up my spirits over this time and this has brought us closer than ever. I, for one, hope words like M***bate can be spoken openly and conversations can be truthful and honest without offending anyone on this forum. IF IT WERE NOT FOR WHAT I CAN READ ON THIS FORUM, I WOULD HAVE PROBABLY GIVEN UP AND STILL BE ONLY USING A VED.