While most have no problems, managing service perception requires addressing the few that do. You can wing it and say yeah everyone has broadband so they should be fine, and the office has mass b/w on a DIA circuit so should be fine, but when things aren't fine these are the elements we look at. Teams has been a solid voice platform thus far for our customers - speaking on basis of comparing to other customers using other cloud PBX solutions, and has a lot of benefits when customer is already invested in MS land.