What is the "Data Visualization" tool you usually use?

Tableau is one of the most versatile and user friendly tool.

I personally prefer to use Tableau, because of the variety it has in its kit and the speed. 

And super like it because it can be integrated with R. 

Qlik lacks substance. 

Excel's power pivot and Microsoft BI are too basic.

gannt chart it best shows the progress

I have used TIBCO Spotfire, and Tableau. Also extensively worked on R -shiny