I thought it was an excellent programme - and not at all sensationalist. Very moving in places - especially that poor woman at the end who made a good contrast to those, like Stephen Fry, who said he wouldn't be rid of it even if he could (though I imagine if you asked him the same question in one of his depressed periods he might have a different answer).
I haven't seen Carrie Fisher for years and was shocked at how dreadful she looked - and SF's little 'to camera' piece after he talked to her when he pointed out she was heavily medicated - and we could only imagine what she'd be like if not
The Robbie bit I found a bit pointless - he isn't bipolar is he, 'just' suffers from depression? I didn't know about Rick Stein's father either (and as an aside...that house !)
Did anyone else find the bit with the two American boys rather worrying? SF raised, but didn't pursue, the point that surely it was a risk if bi-polar disorder became the new 'fashionable' diagnosis. Those boys clearly showed the manic side but I don't recall any mention of depressive periods (other than the younger one was exhausted after an episode). And disagnosing 3 years olds with it seems dangerous to me - don't most 3 years olds manifest some symptoms of manic behaviour?
Above all, I just kept thinking what a lovely, lovely man SF is - he treats everyone with equal respect and genuine interest. I'm very glad he didn't kill himself - he'd be a great loss.