I went to Dr Cohen approx 18 months ago. About 1800 grafts if memory serves.
On the plus side, there has been a definite improvement to my hairline.
On the negative side, the "full coverage" I was promised for the balding area on top is anything but. The coverage is patchy and there is a large strip in back where almost no growth at all occurred. If I comb carefully, and use just the right amount of hairspray, I can get away with looking almost normal. Forget about taking a shower with someone or going swimming.
Oh, and the scar appears to be about the thickness of a magic marker. It's grotesque.
In short, I keep the hair long enough to hide the scar, the hair on top is too sparse, and if I cut the hair on the back and side short enought to match what's on top, I look, in my opinion, like a monster.
I would not, under any circumstances, go back to Dr. Ivan Cohen.
I am not saying he is a bad surgeon. Maybe I was a bad candidate. But my own experience with him was close to disastrous.