The UI is relatively intuitive. I appreciate that I can run the software and see its operation by creating many windows. Additionally, autosuggest prevents me from using Google to research syntax. It is comparable to Eclipse software, thus it meets all requirements.

This is THE best interface for R development work. They have a strong IDE product, but also a strong vision for what is needed across the organization to roll out and share analytics

I like the way that I can step line by line through my code so I can see my data at every step along the way.