Personally, I and some others quit cold turkey, but there are others who weened off and still had problems… most likely due to the flat dosage response of the drug, as noted in the “Study of the FDA Files on Propecia” in teh Finasteride Studies section… ie, anything above 0.02mg inhibits pretty much the same amount of DHT, and you can’t really get anything less than 0.125mg (Propecia cut into 8ths).
But the only way to know for sure how people quit is to take a poll. So I’ve created one and added it to this post.