Agree Dennis ... for large projects a time saver .... and probably saves your mental health too
I have used Lightwave on occasions which allows for layers, selecting surfaces and hiding surfaces ... but the controls are scattered all over the place. This has it neatly all in one spot.
A couple of possible improvements for the future (I know this is a brand new version!)
1. Somehow remember the position, shape and size of the hierarchy window. If you close it, then reopen it ... it defaults back to the small square window in the centre of the screen.
2. Make it a rollup window. Not sure how difficult that is ... but an example of what I mean below (the objects window from from Corel Photopaint)
griff