I would strongly recommend that anyone considering buying a Tivo HD not do so. I just went through my installation of 2 cable cards each, in the 2 Tivo HD units I bought this past weekend. In both cases Cable Card Slot 2, on both Tivos does not tune most of the digital channels and has heavy pixelation, and Cable Card Slot 1, while it does tune all the stations it is supposed to has pixelation even few minutes briefly. In both cases the Tivo is hooked up to the same cable that I had an 8300 HD on. I spent a 1/2 hour on hold waiting for Tivo Tech support, who then walked me through reading information off the screen without any ideas as to how to remedy this problem. Eventually I switched the cards in one of the Tivos and called Cablevision to rebind the cards. Cablevision did this not problem, and again Cable Card Slot 2 had same issues. All the people at Cablevision were helpful and in no way did I feel they were adding to the problem so I would use their products and services. I am convinced Tivo has a serious issue on their hands here. I bought the 2 Tivos from 2 different Circuit City stores this weekend so the odds that 2 separate units from 2 spearate stores exhibit the same issue seems like a big problem. If you check out others experiences on the board you will find very similar results. I have to say all through this Cablevision was fantastic, the Tech was knowledgeable, and although he had not worked on the HD yet, he had installed cards in Series 3 units before. It appears from my testing that all 4 cards worked, and when I called to rebind I was on hold for only a minute, and only spent a total of 10 minutes on the call. So if you want to spend multiple days trying to get a new buggy product to work and doing the troubleshooting and development for Tivo, get on board and get a new Tivo HD. If you expect the Tivo experience with this product, where you connect it, it works and the user experience is great, forget it. I take back every bad thing I have said about the SA 8300 HD, as much as I don't like many of the ways it works and find it annoying, it does 1 thing Tivo HD does not, and that is WORK! Bu Bye Tivo, it was a short return. Good luck with your new products. EDIT / Update on 9/10/07: Well in my opinion it is now time to buy the Tivo HD. It has been an interesting journey, but after testing the most recent update over the weekend I am convinced that Tivo has remedied the macroblocking/pixelation issue for the bulk of the remaining users who were still experiencing this problem. I personally came very close to returing the systems, even to the point of have both back in their original cartons, but I kept them and am now happy I did. As I mentioned earleir in this thread if you have an 8300 HD and want a better experience get a Tivo HD, now ready for primetime (and just in time for the new fall schedule).