This tool requires a good knowledge of how to code in R in order to manage the data to be visualised. Additionally, some understanding of html and CSS is useful in order to visualise data.

For experienced R users, there is little need to go elsewhere for statistical and graphical needs. Learning R takes time, so it's a long term investment, not a quick fix.

With R's multiple graphics packages, you have unlimited access to graphic capabilities constrained only by ones imagination and technical coding skills. Every aspect of every graph can be controlled.