Until you have to connect to one of these so called solutions from your laptop. Using Webex puts my cpu at 100% with a mediocre quality, while I can use hangouts or Slack to call without these problems.
I did a test run on Friday with a guest speaker for today who was calling in from the west coast to us on the east coast. She was joining from a laptop. Connection was solid and worked great. Hopefully it stays that way today!