Sky + is the best thing to happen to DTV IMO, & ntl I don't think will ever be able to offer it.
My Sky service is superior to my ntl DTV in pretty much every way-no red button lock ups, no pictures freezing, no blockiness, I now have full red button interactivity, full interactivity on Sky Sports, a proper TV program guide that actually works, the ability to record 2 channels at once, etc etc.
IMO, Sky's DTV service is superior to ntl's in every way, & Sky + is the absolute bees knees, & the future of DTV.