Some people get site enhancement, some don't. There are numerous reports out there of guys who saw local size increases when injected multiple (anywhere from 3 to 5+ times daily) and have said they kept their size when they got off of it.
I don't know how you feel about Author L. Rea, but he is a HUGE fan of it. He has some interesting ways to run it in his book Building the Perfect Beast for site enhancement.
Search on google and on here for pgf2a, therre is a huge report floating around out there and many guys experiences are in there.
Also go to mesorx.com and read Dharkam's articles on pgf2a. He outlines how he would run it for maximal anabolism.
I have not yet used it, but plan to experiment with it quite a bit in the future. Many have said it sucks and is shit, but i've seen too many people that were very impressed by it to just throw it to the wayside.
If you or anybody else is interested I will grab BTPB and write out what Author L. Rea has to say about this particular compound. It is interesting to say the least.