1. an Illustrator-style object selection engine so you don't have to do that "right-click > pick layer from list" BS. 2. Multiple versions of one screen in a si

1. an Illustrator-style object selection engine so you don't have to do that "right-click > pick layer from list" BS. 2. Multiple versions of one screen in a single file. Think collapsed/uncollapsed states of a form or all of the tabs of a form. 3. Small file sizes because it uses PNGs. 4. Ability to import PSDs and use style from PSD layers. Same with Illustrator files. 5. Customizable patterns UI so you can drag and drop custom buttons, etc. 6. Built in prototyping. Just click-through stuff using hotspots, but it's a good way to see if an interaction is going to be worth pursuing further or not.