It’s ok.

I have several gmail accounts and it gets old signing in and out of all of them in order to access my mail. So, this app is a significant improvement on my workflow. However, I am annoyed by the fact that one account or the other always seems to freeze requiring me to restart the app in order to get into it. After an update or two, and the keyboard STILL freezes after the app has been open for a while. Really irritating. Still it’s better than having to sing out of an account in order to sign into another one. If I find something else, I’ll definitely switch especially since they aren’t going to be updating the app anymore, for my OS (Yosemite OSX 10.10.5)

Carufus about Kiwi for Gmail, v1.8.97