When comparing Default Folder X vs Bartender, the Slant community recommends Bartender for most people. In the question“What are the best power user tools for macOS?” Bartender is ranked 13th while Default Folder X is ranked 39th.
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Pros
Pro Directory assistant Finder Integration
From the Open / Save file dialog, you can access your recent, favorite, and open folders. Includes a menubar item and can add to the Finder toolbar for quick access.
Pro New features are intuitive
Many of the features provided by Default Folder are quite intuitive and quickly become very useful. When a save dialogue is open, just click on an open Finder window to change the current path to that directory. Integrated Quicklook previews make selecting files in the list view much easier, and Spotlight tags can be added directly from the save dialogue.
Pro Cleans up the menubar so it's less cluttered
Pro Great customisation options for the menu bar
Pro Lean and efficient
Does what it is supposed to do efficiently.
Cons
Con Expensive
$15 for download or $7.50 for upgrade if you have Bartender 1.