I have to echo the previous comments about the need for a Beyond Compare equivalent in the Mac universe. I too have been looking for years. Changes is a great start and somewhat fills the niche (though still can't compete with BC). Araxis Merge is more feature complete and stable, but is ridiculously overpriced. I've been using Changes for about 2 weeks and it has worked great -- just a few crashes that have been resolved in 1.0.3. My biggest complaints are around the UI elements. There really needs to be more customization of the look and feel -- the black background and large fonts/icons just don't work for me. I'd also like to see native FTP/SFTP support, not just through MacFuse.

Overall, Changes is very functional, stable, and relatively complete for a version 1.x. Looking forward to the next major revision, hopefully it'll have some UI improvements.