Internet Explorer 4.0 was okay, but had its quirks also. Then came Internet Explorer 5.0. Internet Explorer 5.0 for the Macintosh has an excellent rendering engine. It renders text a lot like you would see it on a Windows computer, and renders tables and other complicated code beautifully. It also runs very fast on any newer Macintosh.
Stability is another issue, however.
May. The machine has crashed 5 times, and all 5 were due to Internet Explorer 5.0. If you don't mind it being a little buggy, it's a great browser. It's fast, renders pages great, and has lots of nice features. It is filled with advanced configuration features with anything from one by one cookie viewing and deletion to saving site passwords so that you don't have to type them in every time you visit a site. It also has cool features such as text zooming and different browser colors.