I recommend organizations just trying it out to start with Pro or Premium Per User. To make Premium worth the investment, you’d need over 500 Pro users, or over 250 PPU users. There are some other benefits in being on the premium side of things.
The biggest premium benefits are larger data limits and more refreshes per day.
More details and about the features of the different licenses can also be found here.
If you have any questions or would like to know which license model is best for you, send us a note.