Ranked in these QuestionsQuestion Ranking
Pro Impressively fast
Faster than most similar applications.
Pro Simple set-up
All you need to do is install a Chrome extension.
Pro Completely free
There are no restrictions on how you use it.
Works on Windows, Mac and Linux.
Pro Easy to install
Pro Keeps making sure connection is still wanted
Every few minutes the sharer gets a popup asking if they want to continue sharing the screen, while the popup is shown the viewer can't control anything. This is important in case the sharer forgets to close the connection.
Pro Allows viewer to make actions
If the user that shares their screen doesn't touch the mouse/keyboard the viewer can control them which makes it easy take actions instead of explaining by voice.
Con Single user only
If multiple users want to connect to a device, they have to take turns.