Well I had a 1Nrs, then I bought a 10D. I was never really satisfied with the 10D in terms of color or AF performance. Especially after my 1Nrs. Well I finally bit the bullet this summer when the $500 rebate came out and sold my 10D and 1Nrs to go 100% digital. I was a very scary week for me when I was selling all my bodies for the new unkown.... But then when I opened the box and put on my lens for the first time, I knew I made the right choice. This is just like my old 1Nrs only without the film scanner. I get the colors I want right out of the camera, and the sharpness is great with a little PP. I have "fine tuned" my jpeg setting and can get very close right out of the camera now eliminating almost all PP. I shot a lot of skiing sequences and other sports and it's fantastic for that. I also love the 8mp file size. Not too big, but I can print 12"x18" with no up-res that will knock your socks off. 20"x30" are also amaizing. As for the size and weight, I don't mind at all because I'd rather carry a tank and not have to worry about it. Also the weight makes it easier to keep steady and the size, well I actually prefer the 1 series size to the 10D/20D with grip. The battery is amaizing. Lasts for the whole day no matter what, even in the cold. The price is the only thing I gave a 9 to and that is to be expected at this level of performance.
Also the 2 things that I would love to see improved, but are technical limitations of digital, not a specific flaw of this camera:
I would love to see even better hig ISO performance. This camera is great and is much better than film and my 10D was, but it can always be improved.
Also the sharpness out of the camera could be a tad better, but again this is a trade off with moire and is a technical limitation. I wish there was a way to adjust the ration or strength in camera so I old had the AA up when moire was a problem. Again this camera is great, but I would love even sharper out of the camera.