Opening the box, features just come spilling out. The size and shape of the mouse are akin to larger Logitech and Microsoft Sidewinder mice, the latter of which is my current mouse. This is an instant plus, because I enjoy the larger mice. The popular "gaming" mice are usually a bit dainty for me.
The next thing I notice is the wrap-around mouse skates. They are quite formidable, measuring just under 3" each. Great for those of us who are heavy-handed and tend to wear down the traditional Teflon "dots" after a few months of FPS play. Attaching the 24k gold-plated USB to this rodent is a braided, sleeved cable. Popping off a door on the underside of the mouse reveals five 4.5g weights which are removable, but wont be in my case, as I prefer a tad heavily weighted device.
In between the traditional right and left clickers, the Sentinel sports a forward-mounted profile selection button as well as a rubber scroll wheel. Just behind the wheel we find our DPI switches, up and down, and then the side-mounted back/forward buttons round out the eight programmable keys. As far as first impressions go, the Sentinel Advance is scoring big points before it is even plugged in.