5 stars: I'm fairly biased towards Google, but I do really like their video meeting solution. It had some issues in the beginning (like lack of grid view), but they've addressed this over the past few months. The desktop app is great, but the mobile app could use some work. I don't like the portrait layout, it would be nice to have a full screen video option in portrait similar to Google Duo.
3 stars: More laggy than zoom or Skype, causing people to interrupt each other. Drops long calls without warning or notice. Mute button should be always on screen to quickly mute things like keyboard sounds when not speaking. Impossible to mute incoming audio completely and just have video (I like to have audio through a secondary session on my laptop)
3 stars: Very nice app, just the data consumption is too high, and too only for my device. I asked my friends and it's just 200-300 mb for them while it's more than 1 gb in my device for the same lecture. Also there's not any option to reduce or increase the quality of video or to turn off the video and listen only to voice. This consumes even more data if video is not necessary and only voice is enough.
5 stars: This is a fantastic app from Google. You can basically have your meetings here and I have no problems with it. The features are great and I like how you can chat in a message box while having the meeting. You can share your screen with all of your classmates and teachers. No problems with this app Google has made. This...