Very useful telephone conferencing tool. Used it three times now and once you get over all trying to talk at the same time (no visual cues & clues) its easy to use and you all talk naturally. Helped to have a practice session first. Helps if you have a pre-arranged agenda and possibly an agreed order of speaking especially if a large number of people involved. Worth having. I can see it replacing a lot of future face to face meetings. Meetings tend to be shorter and more focused. But that might be because most of what we would normally be doing has had to be cancelled/rearranged due to the Covid-19 CoronaVirus.