Ok, so i've registered. and generated an XHTML project. Here are my thoughts:

Pretty good once you figure out how to use it, and also you can't really change between project types (I tried changing the Demo Project to an XHTML project), so don't know what's the point

With the XHTML project, don't we have to change the stylesheets anyways once we download the project? Isn't that what takes more time with designing/developing XHTML forms?

Haven't tried the other project types yet, but will try it out when I get some more time. I'll also create a more "complicated" project and comment more

Thanks for the feedback based on it I've added a 'tips' section to the designer window which might help you along a little. Yes the CSS is probably the hard bit however the generation part is designed to remove the repetitive step - which in forms case is creating the form. The CSS side is more presentation and differs a lot from user to user and so cannot really be generated with that in mind.