If you need an alternative, the company I have been at for the last year uses Zoom, and it's been fantastic. I started using it for mentoring recently.
You mean for codementor? I've been asked people to use Hangouts since I had some trouble with zoom, but it might be my lack of experience with zoom/bad instructions.
I do find the Zoom has some weird defaults, like automatically taking over the full screen. They also hide the settings in the app, and it's not possible to get there from the call screen. But overall I've been pleased with Zoom.
