The beating heart of this product is the "Plan" mechanic, which replaces the mechanics of the host system you're using it with, whether Cepheus, Traveller, or pretty much anything else. The Plan mechanic is a one-roll scene resolution mechanic, meaning that you don't play things out blow-by-blow, but instead roll once to see whether you succeed or fail overall, then go back and write a story telling how that result came about. Or, as the text puts it, "These kinds of questions would not arise in a table top RPG because they would have emerged naturally through game-play. We dispensed with the game-play – but we still need the answers to these questions!"
If scene resolution is your thing, then the Plan mechanic will provide one, along with tips on using it in a solo gaming context. Unfortunately, scene resolution is really not my thing, so I can't say how it compares to other scene resolution systems.
If, on the other hand, you prefer to have things emerge naturally through game-play, you'll probably want to stay away from this one. While it does provide a number of decent random encounter/event tables, along with step-by-step procedures for using them in various types of campaigns, I don't feel that these tables and procedures alone are worth the purchase.