Breakdance makes it super convenient to create almost anything with their advanced menu builder. However, it's a challenge to implement flex styles in the mobile menu as you cannot put menu items inside a div container. I would like to have dynamic content of a user's profile at the bottom of the mobile menu, and all page links at the top. This can be done with flex properties and containers. So you would have 2 div containers and then set the flex property on the parent container. But you can't put menu items inside a custom menu area. This means there's no way of grouping different content and setting flex properties to "space between".
If I really wanted to, I could manipulate it and not use menu items, but instead list items. But then I wouldn't be able to have a dropdown menu item. So it's just a challenge on top of another challenge.
I hope this can be implemented soon. :)