We embed Birst into our own web based SAAS product, as well as using it for internal and customer facing reporting. The biggest gain is allowing us to store our data which allows for easy visualization and analysis.
If the recommendation was for dashboarding and reporting only, and they already had warehouse solution, Birst would not be a good choice. I would stear towards Tableau or custom development for charting (e.g. D3). If they had scattered data or only transactional databases then Birst is a good choice for being able to rein in that data.