Hello XBR4 / XBR5 group:
Overall the performance of the 52XBR5 is excellent. I do have to say that many of the reviews / postings in this forum have a negative or looking for problems slant so based on the feedback seen here my expectations of the TV's performance was lowered going into the purchase. However in real life in my living room the TV's performance is great and so far has exceeded my expectations based on reading the XBR4 / XBR5 avsforum.com postings. Daylight viewing in a very bright room with a wall of windows is excellent. The picture is bright, sharp and HD Football looks great. The Sony remote is missing a feature to give the Vikings some extra points. Night time viewing with a lamp on in the background does not reflect off of the screen.
HD - Mediacom in Minnesota via the Motorola 6416 HD-DVR. The picture looks great as expected. It would be nice if there was a way to add more disk space to this DVR.
HD - built in tuner - The picture looks good, but our cable system is missing an unencrypted HD version of CBS (WCCO - 4.1).
SD - via the cable box or built in Tuner - This has been the big surprise at how well SD looks on the TV. It is obviously not HD but the PQ is very watch-able!
PC - Laptop VGA at 1920 x 1080 looks perfect! All the pixels are there and no motion blur on DVD video or PC games. PowerPoint slideshows also look nice.
PC - Desktop DVI to HDMI 1920 x 1080 looks perfect! The PQ is as good as or better than my 24 Dell desktop LCD monitor.
DVD - 480P component video looks very good as expected.
Built-in sound - The Internal speakers work well and are very useful especially if you don't want to fire up all of your audio gear just to watch CNN.
Blue Ray or HD-DVD - I do not have this yet
Now here's the unexpected part of my review. The first 52XBR5 that I received had a 5-inch column of dead pixels in the middle of the screen. See the attached photo showing the dead pixels on the TV's initial set up screen. I bought the TV locally from Ultimate Electronics (Audio King) in Minneapolis. I called them up and they brought out a new replacement in the box the next day. Their local service does make me glad I did buy it locally and not over the Internet. The new replacement has been working fine.