One star off for a single critical missing feature. Need to add the ability to switch Google accounts within the sidebar. As is it only connects with the default account so if users need to use it with any other account there is no way to switch in this extension without first logging out of every account, and logging into whichever account you want to use for Chat first in order to make that account default. There are many applications where a user may need to use Chat with a different account that is not default. Fix this and I'll give it five stars.

Useful app, now that Google is moving from Hangouts to Google Chats. Probably needs an update because at the moment you pretty much need to have the sidebar at max size for it to work. I already use Tree Style Tab, so I'm used to using the side bar, just not so big. It will be an adjustment, but I could get used to it. It's really nice to always have your Chats visible instead of digging for the chats tab.