Thanks guys,
Splittinghairs, I have noticed some improvement although not as dramatic as the before and after pictures suggest here. Before shows hair messed up,compared to my recent after pictures which were taken shortly out of the shower.
I will update blog with pictures later today that will compare like for like, with a before picture that I took a few months back, but be aware that I have have also started on Propecia in the last 4 months so I'm not a good canditate for judging PRP only. However overall, what I have noticed is a bit of thickening on the crown and a general overall improvment in the hair quality.