I bought the Pro version of the EB&MM immediately without trying the trial version purely on the basis of low-cost and the quality of WeBuilder which I use regularly. I know it's an early version but it already shows great promise and it's great to have an opportunity to give feedback like this.
I'd like to see the ability to select a button or submenu and duplicate it (optionally including duplication of all child submenus items). This would make it easier to extend the buttons provided in the templates as, with so many button styles available, it's hard to see which should be selected to match those in the loaded template.
There's the ability to adjust the spacing between all buttons but it would be nice to be able to specify the spacing between individual buttons. I concur with another poster that tables shouldn't be used.
It would be nice to see integration with WeBuilder so that, for example, the generated HTML could then be opened directly there.
Will there be more icons/templates/arrows available with future updates/upgrades?
Also, see the post I'm about to make in the bugs section for EB&MM.