I just watched the programme - it was negative but that was the intention and only fitting into what most people in the UK think of the Princes anyway. There is not much left from the hype especially around William who was idolized for being Diana's son and was hailed as the saviour of the monarchy. It's not his fault but mainly the media's fault who build up this overrated image over the years only to for the public to realize now that William is unable to live up to this impossible expectation.
I believe that both boys are pretty average at best, not the brightest bulbs around, rather spoilt and exploiting their royal status to their advantage every now and then, hating the media not only for exposing their behaviour, not exactly down to earth or born with the "service to the country" gene. The "War of the Windsors" has probably caused more damage during their character-building years than we all want to believe.
But nothing new here, for me William and Harry are no better than most of the young royals or heirs because of their upbringing, as much as like commoners as possible what makes them act like commoners or wanting to be commoners what in fact they are not. They basically don't have what it takes and are overstrained with their future "job", just one issue leading to an eventual downfall of the institution "monarchy" in general. I can see Charles as worthy monarch but I have difficulties to imagine William in his shoes. These days the respect has gone, it's not the name "Wales" that justifies the qualification but the achievement, dedication, intelligence, just as in any other business. If Charles wasn't seen as qualified because of what he does and has been doing for years, he would already be questioned as capable heir today. If William doesn't step up several gears after his military stint he'll find himself in a tricky position - we must not forget that his father is likely to become King rather short term than long term, so William could find himself sooner in the PoW position that we all think. And from that day it will be substance that counts, nothing else.