I've done extensive research about it and have seen thousands of results. Its not only about the clinic
- They can only harvest 8K/10k hair at max (in 2 procedures, it's 4k / procedure) on the back of your head. You've 100k on your whole head. Do the math. You're not going to have full density if you're NW6, not even half.
- If you dont take fin, there's a high chance that you're going to lose the rest of your hair and have hairs that are just hanging on the top of your head.
- If you're going for a FUT, you're going to have a scar on the back of your head. If you happen to lose the rest of it, you might want to shave, but you'll have a scar on the back. Not very pretty. Now your only solution is to have a donut of hair on the back. Go for FUE just in case your lose your hair after.
These facts apply for every doctor, every procedure. Of course some of them will do wonders with 4k hairs and others will do a shit job.
bonus : if you've curly hair.
HT is great for people with low expectations that want some hair on top of their head and dont want to shave it.
you can have great results and get all your hair back and hold it if :
you take fin, you're NW3/4 at max, you've a good doctor