Pros: Excellent resolution and feel in the hand. Perfectly sized for my hands. Click action feels solid.

Cons: The right-most button on the side of the mouse is frequently accidentally actuated by the fourth finger (for right handed users). The saving grace is that, this button is by default, mapped to the scroll wheel illumination color. Therefore, it is a bit annoying but does not impede actual operation of the mouse.

Other Thoughts: If you can find this mouse on sale, it is absolutely a great deal. The switches are stiffer than my previous mouse, but may or may not loosen up over time.

Pros: Price

Cons: Used this mouse one month and the left main top button started sticking, after two months the button is shot and doesnt work at all, therefore the mouse is useless.

Pros: Bought on sale.
Has all the features of mice that cost 2 to 3 times as much.
Software that allow you to do just about anything with the mouse, even set an alarm, lol.
Macros, full button reassignment.
Soft touch rubber feel.
Good response from all buttons. Not too soft or too hard, just right.
Bought it for the button on the right. I basically only use the right button with my ring finger for (back) - i'm right handed but i don't move my thumb from the mouse. So left button never gets used. See people have different needs that aren't always available. Ambidextrous, ( I use fingertip grip. It's ok for it.)

Weight system is useful. Good build honestly for the price it was a steal.

Cons: 1. The sensor is average. It's optical on the 5500 but it's far more jittery than a $10 blue led mouse i bought off A.
When i say jittery it's not horrible. It's just average. It tracks ok and is usually smooth, but hickups here and there.
I also was just playing Quake live and it just stopped working. I had to unplug and replug it back in. The 10$ optical blue led mouse has perfect feel and basically perfect tracking with no bells and whistles.
Luckily this one was only 20 bucks on sale so i'm only slightly annoyed. But it's still going back.

2. You can change the Thumb wheel light color and brightness but not the yellow logo at the rear of the mouse, and it's BRIGHT. If i kept the mouse i would paint over it or something or break the led out.

3.Almost forgot. The DPI switch is actually in a really bad spot. the top edge of it scrapes your finger pad when you try to use the scroll wheel and it's kinda sharp edged. I kept accidentally changing the DPI when gaming. Not good. Your mileage may vary. That is probably the worst part about the mouse build wise. I had to just disable the dpi button in my profile.

Other Thoughts: I think this company does attempt to create good product for the price and in general there is a lot good about this mouse when found at the right price. I would say it's better than R's stuff easily especially since R's stuff is essentially the same or worse build quality. Maybe not Logitech quality? But pretty close.

Pros: This mouse fit the bill of an affordable MOBA gaming mouse. I play league of legends and I enjoy having the extra macro buttons for my skills. It really does make gameplay much easier. This arrived packaged neatly and it was a breeze to setup on my computer. The design is very clean and it doesn't feel alien on my hand.

Cons: wish the logo light could turn off

Pros: Comes with weights. Got it at a good price. I like the style and changing led. Very precise tracking.

Cons: Not the best for larger sized hands. The software that you can download for the mouse has a cluttered interface.

Other Thoughts: It took a while to get used to. I have larger hands and kept accidentally clicking the right side button. When you finally get used to the mouse its not bad at all.

Pros: Highly customizable, sleek, good matte finish for grip, very resistant buttons (i.e. will take a lot of clicks), customizable display colors, mouse software allows for easy button customization (or disabling) and tuning (DPI, acceleration, colors, polling). Good for large hands.

Cons: Right side button is poorly placed for transitioning from any logitech mouse.

Other Thoughts: I transitioned from a logitech G5 (the kind with the molten blue and black finish) to this little beauty and I'll have to admit, at first I hated it. After a couple weeks of forcing myself to try and get used to it, I've found that I really can't complain: it performs all of its duties spot-on. I still have to get used to the acceleration and try to find an exact DPI that I'm comfortable with, but otherwise this mouse has performed admirably for its low pricepoint.