I've had a 1DsIII for a little over a week. I can say with confidence that it is the finest DSLR I've used to date.
There have been lots of posts on various forums questioning the logic of upgrading from the DsII. I can see the cost / benefit concern, but ONLY for those coming from a DsII. Heck, even in that situation, there are a number of benefits beyond the "incremental" resolution increase.
After the 1DIII fiasco (I returned two of them), it was a big leap of faith to order a 1DsIII. Now I'm glad I did.
"How can anybody be enlightened? Truth is, after all, so poorly lit."