Another benefit of MyGeneration is that there is a customisable interface that you can extend with winforms to generate your own UI for code generation. I have seen no other code generators that do this (at least free ones).
Unfortunately, often tutorials and code samples tend to be biased to Visual Studio users. The main bad thing I have heard about Visual Studio is that it reformats you HTML code (much like Front Page).
Hopefully Whidbey will not do that and will generate valid XHTML (rather than MSHTML) - and unbiased (at the moment anything but IE is considered downlevel)