I agree. Had my cableco not axed the analog stuff a year ago, I would still happily be watching only the lower 90 channels and only SD, because I watch *only* the DVR, and that meant Replay. I would be blissful in my ignorance, if you will.
Having been forced into the digital world, and having had HD for a year, I must say I like it--but really, what I'm watching TV for is the story, not the details of the picture. While I like HD, I can easily get along with analog or SD if that's the way the wind blows.
So anyway, the cableco went digital and forced me to go to Plan B. I already knew about the Ceton stuff, and it was really my only choice when the chips fell. So I went with it. Am I happy? Well, there's no doubt I loved my Replays. And there's no doubt there are a few things that Windows Media Center doesn't do that Replay did. But on the other hand, there are LOTS of things that Media Center does do that Replay never got around to.
The best of all worlds would have been Replay continuing to develop their technology and coming out with a new version that handles all the new signals, but is still Replay under the hood. Given that that was never going to happen, I'm very happy with Media Center and everything I can do with it, and how closely it gives me the "modern day ReplayTV" experience.
I just last week gave away my four Replays, to a buddy of mine who still has analog cable (T-W). He knows it'll go away, but for now he's digging Replay. When analog goes away, I'll outfit him with Ceton or else T-W will have a suitable whole-house system.
(Around here, WOW cable has rolled out their Ultra TV, a superb whole-house system that I would have bought into a year ago had they offered it then. It's based on the Moxi system that until recently was a standalone product, but which sometime in the last year was bought by Arris, a cable systems integrator and equipment supplier.)