The Model I is a lightweight wired mouse that is both comfortable and capable. It is available in either black or white. The Model I feels a little more comfortable in my hand than the Model O and D because of the thumb rest. Its design fills my hand in a similar way to the Basilisk mouse, and its size doesn't get in my way of reaching its buttons. It feels great to use.
The Model I mouse has three thumb buttons against a semi-translucent strip. There is a DPI clutch below that row of buttons. The thumb button in the grip can be swapped with the mouse's DPI clutch. You can find the right feel for your taste with the additional buttons.
The mouse has the same sensor as the wireless versions of the Model O and Model D. The mouse can be used with Windows, macOS, and Linux.
This is a low-risk option if you don't want to spend a lot on a wired gaming mouse. This one fits into its lineup like a glove, because it is a value-focused gaming accessory.