+ It works.
+ It snaps to document edges and rulers using Alt key.
+ Dynamic Symmetry overlay looks cool and provides visual mark for center point.
+ "Inscribe" (as side effect) allow to quickly set crop area same size as image and provide nice starting point for further crop adjustments.
+ Can use Presets (hidden in global menu in top right corner of the panel)
Bad things:
- No "Centered" tool setting or hotkey. This makes near impossible quickly crop symmetrical borders.
- Undo doesn't work with Crop movements.
- Impossible to use already created Rectangle Lasso as Crop area when switching to Crop Tool.
- With special menu command Rectangle Lasso can crop layer in Picture Mode, but can't crop document in Document Mode.
- No quick "Reset" button for value fields. Need to use Reset command in global menu in top right corner of the panel.
- Buttons rows arranged in unusual order compare to other tools with similar options.
Here is small example sketch with added missing options:
