Hair Transplant Advice?

Hair Transplant Advice?
I am getting a hair transplant operation Dec. 15th. This will be my 6th
operation. I have heard some people get all the work done only to see all the
grafts fall out in a few years anyway. I started mine beofore I lost all the
hair on top so gaging the hair lost that would have been lost anyway compared
to the transplanted hair that may may not have been lost is hard to tell.

All i know is I had more hair after the first three sugeries then I do now
with added 2600 grafts since 2001. But that was back in 1995 and I was done by
1996 and still had the crown to work on. I only started with the frontal hair
line.
This time with a new Doctor I have seen since 1999 she is suggesting 1000
more grafts. I worry I will end up with less hair in the end then had I just
let nature take it's course. Does this stuff work for anyone? The hair that has
been in my head since 2001 is still going strong.
Any advice from guys who have been through this? I am 35 years old.
John