Pros:

• It is a great powerful app where you can easily do development without writing any code
• It does reduced time-to-market for both individuals and businesses who do want to innovate quickly
• It does help eliminate requirement for manual coding by just doing a simple drag and drop
• You can connect it with REST API within the Dropsource editor making it really easy

Cons :

• Really easy way to learn. I don't find any cons in it.