Pros: Dropped it several times = it is strong like bull.
Kinda cool it keeps track of every single button press since you've used it if you install the drivers.
1.5 million left clicks and counting...
Kick it, beat it, submerge it in acid, it will keep going without complaint.

Cons: I pressed button #7 3146 times, 3145 of them by accident.
Stupid big awkward thumb...
I mapped it to my 5 key because i noticed some work documents with random 5's in them.
Still rated it 5 because hey, that's what i mapped it to, can't be mad about that, or else i hit it by accident when selecting the rating eggs.

Pros: none

Cons: I owned this mouse for 1 week, failed as soon as I installed he driver, mouse started to wig out, buttons randomly worked, computer wouldn't recognize mouse any more, so I wrote to Steelseries, for a RMA, What a joke on getting anyone to help, there system is not very good, the RMA process is terrible, been sitting on a RMA process for over 2 months, last reply I got was....we have approved you're RMA, we are processing you're RMA now for shipping, here I have been waiting for 2 months, confirmed my address and still sitting on a broken product. not very impressed with Steelseries,

Pros: * Very High DPI (5700dpi)
* Beautifully Designed, nice emblems and Lighting
* Braided Cord, very long
* 1000Hz Polling rate
* Highly Customizable Buttons and Lighting effects (though it does only light up red, no other colors)
* Buttons feel very durable, work very well.
* Comes with a Steel Series Logo stick for case or whatever else you wanna put it on.
* Only paid $50.00 for it. ($69.99 on Newegg)
* Diablo 3 is awesome.

Cons: * Might just be my weird hand, but I constantly push the buttons on the right side by accident, which is a pain while gaming. I think that could have placed them better.
* Price is a little steep in my opinion, I wouldn't have paid what newegg is asking for it. ($69.99)

Other Thoughts: All in all I am happy with this mouse. I only paid $50.00 for it, and I think that was worth it. It sells for $69.99 on Newegg, but I picked it up at my local retail store (Newegg won't let me say which because they feel it is inappropriate... lame) for 20 bucks cheaper. I originally wanted this mouse refurbished on newegg, for like $20, but they sold out FAST! In my agitation, I just bit the bullet and bought it brand new. I don't regret my decision, but I still hate that I missed such a good deal even though it could have been problematic being that it was refurbished.
I would like to point out that this mouse has red lighting in it that glows on and off slowly, you can go into your Steel Series engine and change the speed of this effect, or change it to OFF or Steady On. There is also an option to have the light blink with a "Trigger" effect, in other words it will blink every time you press a mouse button. Nice mouse, but I recommend that you get it on sale.

Pros: Great looks, great build quality, amazing cable, and it is extremely accurate.

Cons: FINGER PRINTS!!!!
Scroll wheel i extremely loud.

Other Thoughts: I had to basically nit pick 2 things that where bad. It is a really good mouse..

Pros: Great until it breaks

Cons: Only mouse I've ever owned that has stopped working before 5 years. Stopped after one. Tracking issues on a steel series mousepad and the scroll wheel won't scroll down all the time without randomly scrolling up 20 times. Scrolling down will actually cause me to, on average, scroll up.

Other Thoughts: Would not buy again. Have series doubts about any of their other products. Inexcusable for a 70 dollar mouse.

Pros: Nothing, this sub is perfect for the price. 100% satisfied.

Cons: None.

Other Thoughts: Good job Yamaha.

Pros: Software,
light effects,
dpi,
button layout,
ambidextrous

Cons: Over time the mouse scroll wheel degraded and now has issues scrolling up or down (mostly down). Precision issues have also been experienced when the mouse is not completely planted on the mouse pad. With plastic mouse pads, the mouse does not slide well under intense gaming conditions. The diablo design has also started wearing off.

Other Thoughts: This is a follow up review after over a year's worth of use. I would not claim this mouse is worth more than $40.

Pros: The highest endurance mouse I've ever used. My brother plays a lot of twitch (as in moving and clicking the mouse A LOT) gaming, and eventually killed my Logitech G9x mouse's right click. Now, that mouse is still awesome, and I bought another one because I refuse to play an FPS without it, but if you're going to play StarCraft II, League of Legends, or heck, even Diablo III, you're going to need a mouse that can take a beating, and this mouse sure as hell can. It has a great feel to it still though, and it's still has great sensitivity to it as well.

Cons: None that I can really think of.

Other Thoughts: The sides are made of rubber for comfort. While this is great, it you're a twitch gamer, and let's say have developed a nasty habit of rubbing you thumb along the side of the mouse 1000 times a second, you're going to eat through that rubber coating. I wish it was just made of hard plastic or metal.

Pros: - SteelSeries!!!!
- Diablo III Themed!
- Amazing Utility GUI
- Lifetime clicks feature is really cool
- Timing clicks in a session is a neat perk but not really a big deal for me
- Adjustable DPI (sensitivity)
- Cool LED effect(s)

Cons: - It doesnt morph to match the theme of every game I play
- I have purchased other high end mouses who have a bit better build mouse cable (this one is pure fabric and can start to fall apart if its grinding against the edge of something for awhile >=[ )

Other Thoughts: - This is a rock solid quality mouse.

Pros: Fast responsive good looking mouse with a nice diablo logo that you can leave on flashing or make your own pattern or disable if you don't want it at all... Mouse drivers come with a lot of perks... Macros and even click stats :)

Cons: a bit small for my hands... But I do have a rather big palms so... I got used t to it.... Perhaps felt that way because I had a larger mouse before

Other Thoughts: totally recommend this mouse