I have been using it for about 2 years and about 6 months ago, I had a some shedding for about 4-5 weeks (visble in the shower drain), but it stopped and have not seen anything recently. Overall, I don't observe any hairloss, so I think it may have just been shedding and mostly replaced with new hairs. Not sure.
I was on a .5 mg dose for about 22 months and just recently when to quartered proscar which is 1.25 mg, so hopefully that will help.
I am looking at Avodart, but it looks very expensive (for the time being).