I subscribe to the print magazine and was happy to learn that the digital version is available for free to subscribers.
This digital adaptation of the print magazine is fantastic. There are interactive features (e.g., sizeable images, links to videos, online content accessible in-app) that really enhance the experience. Reading is also a pleasure, as the content is laid out in columns just like in the print magazine. I actually read SA on my iPad over the print version, and may forgo the print subscription for a digital one.
If there was one feature I wish to be incorporated, itd be selectable text for definitions using the built-in dictionary. However, this may be more on Apples end than SAs.
I highly recommend SA to anyone who enjoys in-depth science and research.
SJism about Scientific American, v1.1