Better to ask and get a Quick Answer.
A good question might be: Why are all you guys playing Civ 3 instead of Civ 4?
I'm sure you'll get Quick Answers to ANY question in the Civ 4 QA. Ask away....players love to help!
A good question might be: Why are all you guys playing Civ 3 instead of Civ 4?
I'm sure you'll get Quick Answers to ANY question in the Civ 4 QA. Ask away....players love to help!

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I've had good luck with them and I've had bad luck. They're great if you find yourself in possession of ivory, but without horses or iron. Just like any other unit, though, you should put them in stacks. My problem is that as soon as I get one, I'm ready to send it out onto the battlefield when I really should wait for 3-4 to get lined up. The other really nice thing about SoZ and Knights is that the city that gets them is effectively doing double-duty in producing units.
It does not work particularly well.