I learnt so much about wine and the wine industry from this DVD (I rented it via Lovefilm). I loved it.
Oxford educated and extremely eloquent, Jancis may be a bit of a dag, but my goodness I learnt alot. She is obviously very much a part of the inner circle of the wine club. However, this also gives her unprecedented access into this world, and she does strip away alot of the mystique that can surround wine and wine snobbery.
I would agree that there isn't so much on training your nose to taste wine (buy a Jean Lenoir Le Nez du Vin or similar instead if you want this). Instead you get a very compelling and extremely enjoyable documentary about wine and the wine industry in general.