I like the variety that is available with solarplates. You can not only use a positive transparency, but also photogram objects or a hand-painted image, or even something drawn with crayons. The double exposure option with the aquatint screen opens up your options further by allowing water-based inks and deeper blacks. I also love that this book provides a list of potential problems that could occur and all of their solutions to help any beginner have success with this process.