SSS is a highly entertaining story in a CYOA style. The paths are numerous and highly varied, and the writing is done well. It is definitely worth the time to go through every link and read every branch.
It's a very entertaining story on its own, but there are many references to other stories by the same author. If you read and enjoy SSS, it is definitely worth going back to again after reading some of Endmaster's other stories in order to get another appreciation of it.