I finally made the time to utilize the panobook as I originally intended. I wrote out a feature list, interaction notes and the inspiration for an iOS app I may design and develop. The little crosses on the page make it easy to box out three mobile device sized wireframes. The paper stock is great with pen or pencil. I could have done all this with any notebook, even a legal pad. But the panobook is designed for these use cases and the quality just shines through.