My web site uses Themify Builder but having tried out your Page Builder plugin I would like to use it instead. I am very impressed with the ability to use third party plugins. I believe that your simplified approach would help people to edit their own pages.
There is however a layout problem, the space below the header can be set to be only about 12 pixels using Themify but I cannot see how to reduce the 92 pixels that your plugin seems to leave. The link shows how it looks:
I have just tried to save the page again by clicking “Done” and then “Save Changes”. The content is saved but the two column layout gets merged into a single column. What is going on?
Have you tried adjusting the margins for the rows or modules on the settings advanced tab? If you can provide me with login info for the site, I can have a look at the merging columns issue.