<p>Wizards can kick-start features. They can also obfuscate your code, and are anti-YAGNI.</p>

<p>On balance, do you think Wizards are more useful or more harmful?</p>

They're there for a reason - to try and make your life easier.
They can be useful and save you 5 or 10 minutes of typing.  Of course it's best to read and make sure you understand what they've written for you.
If you use them without understanding, then they could be considered harmful in the fact that they're letting you get away with not learning something you should probably know, but on balance I think they're a good thing.