I have used Kiwi Lite for about a week now. It’s a fantastic app—it loads quickly, it doesn’t eat up much RAM or bandwidth, it lets you know when you have a new message, and despite all of that, it stays out of your face. Kiwi hasn’t once tried to bother me, not even about upgrading to the full version (which I fully intend to do).
As a multi-account user, I’m looking forward to the paid version, which should be an absolute game-changer for my workflow—no more keeping three browsers open for different gmail accounts.
The interface is identical to the official GMail website—I keep pressing Command-T to open new tabs after I read messages because I forget I’m not in a browser! You can change your settings, mess with Google Labs features, play with themes—from what I can tell, if it works in gmail, it’ll work in Kiwi.
My only, very minor, complaints, relate to the window interface and the typefaces. Kiwi uses a (very subtle) interface at the top of the window, with a glossy green and drop shadows that clash with the matte stoplights that recent versions of OS X use. Further, some of the typefaces used in the settings section of the interface are serif, when they’re sans-serif on the web version. Those are seriously the biggest problems I’ve found with the app so far, which should give you an idea of what a great little program it is.
If you use gmail on a Mac, you owe it to yourself to twy Kiwi.
Jette37 about Kiwi for Gmail Lite