I like that it has an easy to use web interface so anyone can pick up right away without needing any training or support from Salesforce employees, which was very helpful since we are not always able get them at short notice when needed! It's also really simple in terms of adding new users/devices with ease - no need install software etc., just click "add" button under each device you want added (phone number) then go through their quick setup wizard & set everything else yourself; if there were some more advanced options available such setting email addresses / passwords would be great but overall this tool seems pretty good already! A lot less hassle than using traditional PBXs + additional softphones installed locally by phone companies themselves ;-).