I watched it last night as I was trying to get to sleep (HARDtalk usually does the trick). I don't think he came off well or particularly contrite, just quite bitter.
Hamilton comes across very well in his new book, i am only on chapter 4, but he seems like he is telling the truth with accurate account of doping, it was almost as if he had no choice if he wanted to compete as a GC rider! He still suffered as much but could just go harder for longer, & importantly recover quicker!