Yeah and even on the Mac, the DAV behavior changes from 10.3 to 10.4. In 10.3 https is not supported, in 10.4 it is.
It all you are is one person wanting to do one thing, and you always access it from the same platofrm, it works tolerably well. If you go anywhere outside that things can get complicated quickly. You are at a friends's house and they have WinXP you may have some issues. Or you have set it up to work with Win2K maybe you won't be able to get to it from a randomly chosen Mac box. Get my point? It is not hard to setup, it is hard to get it work WELL.
Also, as I mentioned the file ownership model violates good Apache security principles. The files end up being owned by the web process, ordinarily not a good idea. Also it doesn't really encompass the idea of multiple users, although you can work around that with some grody hacks. If you have 10.4 and all you ever need is I-Disk support, fine it works. The more you try to do with it, the more of a migraine it will give you because it was really not designed for file-sharing, I would call it someone's quick hack to let a web-developer edit content without consideration for security.