Like it has been said, it's a tough decition to make, and you're likely going to commit yourself to successive procedures. It's expensive, and theres still the risk of not having enough donor until old(er) age.
From the heart: first try shaving down, i did that for 3 years until taking the plunge. If you don't like it, well..
I'm 23 and have had 2 procedures, might need a 3rd one (small session) but i'm only 8 months post op of my 2nd so it's hard to say.
For me, it's been a lifesaver. I feel so much more like my peers now, less alienated, much more calm inside. If i run out of donors in 10-15 years, i think i'll just shrug, shave it down, maybe some fue into the scar and call it a day. I actually don't mind people seeing the scar as much as i mind them seeing my receeding hairline.
Just a word from the other side of the river..