Looks great. I don't want to sign up to try. Instead I went looking for images (or a demo) page but didn't find any. The images on the frontpage and in the template galley are too small to see the details. You should make some high res pictures of the templates available.

I would also suggest you to promote the link to the template gallery so i appears on the top of frontpage. The template galley seems to be a good way to display what your app is all about. You should make the template gallery easier to find for new visitors. Good luck!