It connect easily with my sales tool (SalesForce), we can keep the tracking of the call, recorded, for sales team this is a good point for check the daily activities, FUP and continuity in projects. If you forget something it will be part of my sales toll records.
If you have any doubts the support team use to answer really fast (this is an excelent point).
The upsides of using Dialsource is get the information easily in my sales tool.
Those points are the most important in my opinion, but I need to choose one the tracking provide in my sales tool is the best possibility provided. Review collected by and hosted on G2.com.