It's well suited for dynamic data, especially when multiple users are using the application and generating data, it helps us to get analytics of the data for users.
It's great to develop business applications. Previously, we tried different technologies but we find it the most suitable for us. We also deploy a generic backend so we don't need to install anything new to implement new applications. This helps us to develop very fast and with very low effort.
Protoviz does not require as much knowledge of programming to build visualizations as with D3.js or Google Charts. Highcharts or AnyChart are other alternatives that are more specific to building charts only
Each of the above platforms offer a specific solution. Sencha provides a complete solution that is a library of components as well as a framework to modularize your application so that it's better manageable. Once you get over the learning curve of the whole technology it's a breeze to implement new functionality within the application. We have an aggressive client who comes to us every other day with some new requirement, and sencha has been able to answer all of those without issues.