Replace cable box with Tivo


It is my understanding that Tivo can replace the cable company's box with the use of two cable cards that must be provided by the cable company. Also I was told that the Tivo unit would provide HD viewing of those programs provided in HD by the cable company. Does anyone know if this is true? I appreciate any input anyone can provide.
walnut
strongly suggest you avoid Tivo...it noticeably degrades the picture quality. I switched to the Comcast HD dual channel box and the picture quality is stunning.
Larry
Walnut -- you are correct on all counts. The only thing to add is that by going to cable cards you lose two-way communication, so you can not get PPV.

Larryken -- very interesting, first time I have heard this, though I don't read AVS forum, so it may be old news. I bought the TiVo Series 3 the day it was released, that's how much I missed its UI compared to the Comcast box we got when we got our HD set. I was so happy to have TiVo back, I might have overlooked a difference in picture quality. Had it been truly noticeable, though, I think I would have noticed it immediately. Can you say more?
I have TiVo HR10-250 and DirecTV Plus HD DVRs. The picture quality on both look absolutely splendid. I'm skeptical about Larry's universal pronouncement, thinking his experience might be particular.

db