Considering that you pay twice as much for commercial terrestrial TV as you do the BBC license fee (the ads have to be paid for and it sure as hell isn't the advertiser but Joe Punter, reflected in the selling price), and considering that Joe Punter pays through his purchases for products advertised on Sky, even if he doesn't have Sky, and then Sky charge you another massive slab on top of that, the BBC is an absolute bargain!
No effing interminable adverts every eight minutes, a country wide network of local and national radio stations, a brilliant web site, the red button, iPlayer, The World Service, two HD channels and two non-HD. The BBC offers a lot wider variety of services than anyone else.
I just wish their programming would improve and for people to stop saying that commercial terrestrial TV is "free". It isn't.