I'm a long time ACR user, but just recently tried out C1 4.1 just to see what it offers. Like many here, I found that the program was extremely slow on my machine, which isn't saying all that much (using a dual G5 2.3ghz, 6.5gb ram, 10.4.11). But to zoom in/out, move a file around, or many any adjustment, it always takes 3+ seconds to make the adjustment then "focus" the image. Is that a typical experience for this program? And when making changes to files, must I process the image (thus creating a new TIFF) just to open it in Photoshop? It took me a looooong time (+30 mins) to work through a test folder of 50 or so files, which took about 10 mins in ACR. I did like the way the C1 processed the images, but does it require a beefy Mac Pro to really get it going efficiently?
Is C1 Pro any better? Will it support DNG files?