I'm loving this. The only problem (really, honestly, the only one) is that middle-clicking doesn't open a window in a new tab (actually, it doesn't do anything at all.) It renders everything Mozilla does (ie virtually everything), is very fast, and I like the look, kind of how Safari should have been if Apple hadn't had that brushed metal fetish.
(Edit - before I forget: If you used the older version, go into ~/Library and rename Phoenix to Phoenix.old before running the app, when I didn't it came up but didn't work properly - scrollbars were missing, Cmd-T didn't work, and more. You can reimport your bookmarks by bringing up the Manage Bookmarks selector, clicking Import, and going to ~/Library/Phoenix/profiles/??????/??????/bookmarks.html)
Compared to the other browsers: Mozilla looks uglier and is much slower and eats up memory. Safari also looks fractionally uglier (unless I go in and edit the .nib so it uses the non-brushed look) and doesn't render everything I want.
IE I'm not even going to comment on.
If they can fix that middle button issue (which seems trivial), I'll probably swear off Chimera/Camino for good.
This is good stuff