I have never seen the inside of LayerVault. The demo page only has vague outlines of similar controls. Does anyone have screenshots of LayerVault in action?
Those are pretty old pictures, and for sure it's not clunky. You can try out the 30-day trial for free. Nowadays it looks like this: http://cl.ly/image/1k230I2l421S
http://i.imgur.com/yFHlGVH.png
http://i.imgur.com/VX1h4Xj.png
http://i.imgur.com/oyAYDM8.png
http://i.imgur.com/ZUlf0hF.png
http://i.imgur.com/QMSTZ8k.png
Given that they don't show it off on their demo page, it's either incomplete or clunky.