netbeans is better than windowbuilder 'cause i can resize better component by hand.
but it creates shitty comments in my opinion....there's a way to modify the locked code (autogenerated code) by netbeans?
Netbeans WYSIWYG editor is called Matisse as far as I know. Therefore, you should compare Matisse with Windowbuilder and Netbeans with Eclipse.
In my humble opinion, if you haven't already done that, learn to write complex Swing GUIs without this kind of tool and use them only when you are comfortable with Swing. Trying to find where you have to put your code will make you waste a lot of time especially if you're a beginner in Swing.