I think the child-parent relationship functionality in MR is really fantastic. It probably could use some better clarity and documentation, but is a tremendous tool for building rich applications.

I have a couple requests --

1) Currently, it appears there's no way to create related connections from the parent type to the child in the backend. There's also no listing of existing connections when viewing the parent record.

2) I would love for there to be the same multi-select form field available for the parent, when adding/editing from either the front or backend, as there is for the child record. While the popup on listing pages is nice, it makes more sense for users to have the field actually visible/available on the main form. And the ability to have bi-directional connections is really valuable.