Speed is not the object. It trips all over itself with complex sites like slate.com, but not bad.
To me it is very important to have easy access to my Personal Toolbar Folder, and see no way to introduce it, either as Tab or as a Toolbar. The fact that I cannot open Safari with more than one Tab is a big minus.
But, what about the plugins? about:plugins indicate that I have access to all the plugins available in firefox, but, it does the following. With .pls or .mp3 files, Safari downloads them. The player does not open. With Windows Media Player file, it produces a blank page.
Example, Selecting WMP, I get this on the URL bar:
http://azulweb.streamguys.com/kut1.asx
and, that's it.
I tried to send a bug report, and, as it has been doing with everything else, like customize, it instantly crashed. Well, I got the iSafari theme for Firefox, and that may have to do.
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en) AppleWebKit/522.12.1 (KHTML, like Gecko) Version/3.0.1 Safari/522.12.2