[__david__]

I use it every day and it works fine for me. Since Mac OS X has unix underpinnings all the good stuff works just fine (unlike trying to use M-x grep on windows). If you compile ispell and put it in your path then all the spelling stuff works, etc.

I had to do very few Mac specific things in my .emacs to make it comfortable.

And on top of that it supports basic mac interaction, so if you drag a file into the window it'll open it in a new buffer, you can associate files with it so that double clicking them works, etc.