CyberDog was actually compelling for end users, unlike most OpenDoc components. Best Mac web browser UI until Safari, and best mail client for a long time. Became obsolete due to the progression of web standards very quickly, though.
I remember finding and using CyberDog for while. I think one of the features was the "back" action was fast (instead of basically reloading the previous page from scratch), which sounds boring, but then noticeable when using another browser.
I also seem to remember that much the team went on to work on IE for Mac, which was an entirely different code base from Windows IE.