Some of the more common features, like on-the-fly DPI switching, are implemented without flaw, on par with other mice on the market today. I did feel that, at high sensitivities, the mouse was hard to keep stable on a cloth mouse-pad, as slight variations in pressure without physical relocation of the mouse would result in movement on the screen.
One particular feature that was noticeably absent, though, is tilt-scrolling on the scroll-wheel. This is one feature commonly included on mice nowadays that would have been a welcome addition to the Behemoth.
Unlike the Eclipse, though, the weight system is at the bottom of the Behemoth, which makes for a more sturdy general experience. Personally, I like a heavy mouse, so I opted to keep all of the weights installed, but the option for customization is always welcome.
Many mice these days have multiple profile capability, and the Behemoth is no exception, with four available profiles. While I especially like the ability to store all settings on the Behemoth and keep it a truly plug-and-play device between machines, I find the fact that the profile button is on the bottom of the mouse to be extremely inconvenient.
Apart from the light weight of the included software, I think that it has a lot of room for improvement. The layout of the setup windows provides for less than transparent functionality without the manual, and features such as Keepshot, as Shawn found with the Eclipse, aren't the most functional.
Like the Eclipse, the Behemoth is on sale at popular online resellers for about $25.00 USD, which is stellar for a gaming mouse of this grade. Along with this amazing price-point, for its great feel, on-board memory capabilities, and general functionality, the Behemoth earns the OCIA.net Seal of Approval.