I've heard of it and I can highly reccomend the London Hair Transpant Clinic. Over the past couple of years my hair has been thinning, not at an alarming rate, just very noticable. Genetic I believe, especially if you look at my dad. Anyway I went to the London Hair Transplant Clinic, where I received a very welcoming reception, was looked after and was never rushed at any point with my consultation. I can only offer praise for this clinic, and I guess it is each to their own with their experiences, but my experience of this particular clinic was very very good. The staff were all very caring and reassuring, and the after care that I received was excellent. If you are looking for hairloss treatment, then I personally would highly recommend giving the London Hair Transplant Clinic a go.
Best of luck.