I'd bought a Razer keyboard, and decided I wanted a Razer mouse to manage everything under Synapse. I settled on this one to replace a Logitech G700, despite my doubt that it'd really stack up. Imagine my surprise, then, when I realized that I actually like the Deathadder better. Simply put, it's the most ergonomic gaming mouse I've used. Visually, it looks like it should be smaller, but it feels slightly longer and has less of an arch, which is perfect for my palm grip. The scroll wheel provides just enough resistance that you won't move it accidentally, but not so much that it's tiresome, either. It has just the right amount of curve, and my thumb naturally rests so that it can easily click the front thumb button with the tip of my thumb or the rear one with the joint, but neither button protrudes noticeably. There's textured rubber material on the bottoms of the edges for those times when you need to pick the mouse up. My only complaints, and neither are enough to warrant taking away any stars, are that the mouse is lighter than I was expecting (but something that I'm quickly adjusting to) and that the ability to customize the lighting is sort of wasted, because the Deathstalker keyboard doesn't come in a Chroma version. I have the Deathadder set to static green to match the keyboard.