Specs are quantitative aspects of the option such as the price
Pros
Pro
Calipso is built using a modular approach
Calipso delivers it's functions by using a modular approach. All of the core features that you would expect from a CMS, excluding theming and forms are provided by modules.
Calipso runs with MongoDB and Express in the background
Calipso uses MongoDB through Mongoose as a database and it runs on top of Express, the most popular framework for Node. Making it very simple for anyone experienced in Express and used to working with Mongo.