Summary: The mouse wheel for this mouse started sticking. Also, the three dpi settings buttons in the middle were too easy to hit accidentally while using the mouse, so I ended up setting all three to the same dpi. I ended up replacing this with a mouse from Logitech, and it doesn't have any of the same problems. I've used the replacement for at least a year now, and wish I had saved the money and just gone straight to that.
Summary: We have 3 of these mice and find they suit our needs (browsing, emailing, writing and gaming) perfectly. The adjustable sensitivity on top and side buttons are frequently and easily used features. More weight would be nice. We have 2 as spares as we want to be sure to have replacements available for a long long time.
Summary: After trying the Mionix Naos, Logitech G500, Razer DeathAdder, Logitech Performance MX and various cheaper mice, I finally found a mouse that doesn't hurt my hand after extended use (this one). It is wide and is the only mouse I tried that was *wide* enough for my hand (full pinky support).
Summary: This mouse is decent. I enjoy the fact that I can change the sensitivity on the fly with the buttons on the top, and it is a very robust mouse that serves your needs. I use it for gaming as well as every day things like web browsing and work. Since the mouse is marketed primarily with the buttons that change the sensitivity, I'd say this is an excellent buy if that is what you are looking for.
Summary: This mouse has a very solid feel and construction. It has a good weight which I find comfortable in games. For work and everyday tasks I have had a positive experience with it. I do wish they would reverse the Back / Forward buttons and move them more forward in a future model. Many people complain about the width of this mouse, that they are not used to it being so wide. This is true. This mouse seems to be designed for medium and larger sized male hands.
Summary: I'm unsure why others feel the vertical side buttons are a great design feature. I think they protrude too far from the mouse and I often find myself accidentally hitting them. For obvious reasons that causes a lot of problems in-game. Moreover, while it could be due to the fact that I've been using a Logitech G5 for the longest time, the vertical positioning of the side buttons does not feel comfortable. Overall the mouse feels cheap.
Summary: It's a big mouse and certainly can look intimidating - not so much as other gaming mice though - but is comfortable to use claw or palm styles for long periods. My only gripe about the physical layout is that, from what I can tell, the weight isn't adjustable. But it's relatively lightweight for its size, and honestly I doubt I'd change it much even if I could.
Summary: I love this mouse, The thumb buttons being above and below each other are a great design feature, no chance of hiting one by mistake. It glides really nice on wood, havent tried it on any other surface really. The feet pick up some dust and slow down after about a week of gaming, but thats probably becuase I dont have a mouse pad.I usualy claw with this mouse, though it was probbaly intended to be palmed. Overall a great mouse.