All the times i used other plugins for widget management so i can for sure say one or two words about Dynamic Widgets.
Non of the other give you options to show for instance widget on Posts, BUT ONLY ON SPECIFIC CATEGORY.
Dynamic Widgets is perfect to narrow where and how you want to show widgets.
And Dynamic Widgets is much more faster then competitors.
Small advice, please use accordion as in MP6 admin theme, and make it that one accordion close when you click to open another one.
As it is now it looks very amateurish.