This mouse is like a dream come true, so far.....I have read a few reviews of people reporting issues they have with this mouse, but I have not experienced any.The DPI is 12k, but I am not sure if it's true 12k, I have read otherwise but this is not verified... To play it safe I would use 6k and lower the cursor speed so it feels more like 2k if you want to go that route.No glitching at all, and the lights work flawlessly.Now for the buttons, the 12 buttons on the side feel very nice, clickly and easy to tell apart, I had absolutely no problem getting used to them.The layout is nice, and although I do have large hands, I find myself setting the side buttons back almost as far as they can go...likely because I am coming from using the Razer Naga Epic which is a slightly smaller, lighter mouse.Braided cable and USB connector are of great quality, what you would expect from Corsair and I can say that I never used the Naga Epic as a wireless device, so there is no change there for me.The mouse is slightly on the heavy side, which did take some getting used to, especially when I am playing FPS.. However, You can rais the cursor speed slightly higher than you're used to, which could help a bit.The surface material is very nice.. Soft and a bit rubbery... its a good rubbery, not a sticky one. If you have any of Corsairs keyboards, it's very similar (if not the same) as the top material they use on their wrist rests.as mentioned earlier, The tactile feedback is very nice on the buttons as well as the surface material and the size variation. I find that I make fewer mistakes than I did with the Razer Naga, even though I had been using those mice for years.The software is fantastic. it pretty much allows you to do anything you want. I had no problem learning the software to create effects on my k70, but I can say it's not the most friendly UI, especially for people who don't have THAT much experience using intricate programs with it being mostly a 'text based' UI.The mouse is far easier to program the colors, but there are also also far fewer options, the 12 macro keys on the side can only be adjusted as one color for all 12 keys.Although I probably would have preferred it without, the yellow coloring on the side doesn't really bother me at all. It really isn't that noticeable, especially when you're using the mouse in a dim lit room. Between the lights on the 12 macro keys and the bright light on the DPI indicator, you'll hardly notice it's there.Love it or Hate it, I find that this mouse is perfect for me. However, I can see how people may not feel the same way. There are SO many options out there and it can be really hard to find the right mouse for you. If you have the chance to get to best buy or better yet, a privately owned computer store that sells these products, you can find some peripherals on display and test the feeling to see what suits your needs.QUICK RECAP:Great for people with large hands.Quite a bit heavier feeling than Naga.Nice tactile feedback on macro keys.Lighting works flawlessly, no "flickering" in 16.8 million color mode.matches my K70 perfectly, although it would probably look best next to an RGB Strafe. (because they both have the glowing new sails logo)The optical sensor works flawlessly for me at 6000 dpi with cursor speed turned down. Great buy if you are looking for a great mouse for MOBA and MMO gaming, although it may be a bit too heavy for some FPS players, I find It works fine as long as you like a heavy mouse.Sleek design and great feeling on surface.(wish it came with a corsair 'badge', I love badges) I hope this review helps with your decision.