Great app and subscription service,

I tell ya, Scientific American is doing the whole digital thing right! For the $40 you pay at their site you get access to PDFs of EVERY issue back to 1994 with no restrictions on downloading, and access to every ipad version released as well. No one else is doing this! Honestly an amazing value, especially since articles very often cite past articles with similar content. Makes it very easy to go back when you have access to every issue. Plus, they are doing a great job on their ipad version, very well put together!

Mattf82 about Scientific American, v1.1