One click to reach sales & marketing via audio or video call is a much needed technology in coming days. I find clickacall setup to be very easy & I had run a few test calls for over an hour without much problem. Call quality is good & I have high hopes for your product but I also have some issues to share during my trial run.
When I stopped Screensharing in Audio Call, the video automatically switches on. When I shared the screen of single tab in my browser it causes flickering of the video if there is no mouse movement.
Now it takes two clicks to place a video call & I saw in roadmap that you are going to add the feature of calling from the same page in a single click. Waiting for this update.