As explained in the Getting Started document, simply listing the Pros and Cons is not enough. You need to weigh each pro and con to do the numerical analysis and reach a decision.
When you do not want to do a deep analysis, you can choose to capture the importance of a Pro or Con directly. That is the fastest way to use this tool.
Then click the 'Add New Option' button to start capturing your available options.
Now, the user interface is very straightforward and self-explanatory. You can add as many options as you want. And every option can list as many Pros and Cons as you want.
That's all about it. Any time you change the sliders, the result will be calculated automatically and displayed in the Result panel.