it's a good mouse. fit sucks but mouse is good
347330
Staying in the Apple ecosystem, it's a good mouse. fit sucks but mouse is good. get the pads for the sides, it changes the feel completely
695913
The Kensington Pro Fit Wired Mid-Size mouse has an ergonomic shape with a perfect size that isn't too big or too small. It will be perfect if the mouse have a softer click as it's a little loud.

EDIT (Drop to 2 stars from 5): After using it for 2 years, the middle click stops responding and requires a hard press for it to work 1 out of 10 times. Quite disappointed as the shape of the mouse was really good.
1490391
I do not use the adapter that came with the mouse because it sticks out too much.  I use a different adapter and it works great.  It is smooth operating and the presenter buttons work good.  I would recommend this mouse.
205621
I've had a mouse that fit better and was easier on my hand to use, but this one is close and available.
4159086
Nothing groundbreaking to say here, it's got a great shape, good sensitivity and tracking. I like that Zowie has different shapes and sizes of the same design; picking the right size for your hand is important for comfort and usability.

Pros: pretty much the above.

Cons: The middle mouse button. I dislike everything about it! It's got a high profile and requires too much force to click. The scroll action is stiff and clicks loudly. The LED is just too bright. I know this is gamer gear, but the rest of the mouse has a nice sleek look; the light is just tacky (as usual)
3330857
It's a nice mouse, I use it at work. The scroll wheel doesn't click though, so it is easily brushed and in many cases that can cause stuff to zoom in and out erratically.
4548488
This is a good mouse.  It is fast, responsive, and installed just by plugging it in but it has a very odd texture.  It is something between rubber and sandpaper and it makes your fingers feel funny.  Hopefully it will rub off a bit in the months to come and then it'll be a great mouse.
1675095
I have this mouse for over a year now, there's nothing wrong with it in terms of functionality, the laser is great, everything works as it should. So why the 2 stars? The ergonomics in it are really bad. The side arms are curved is such a way it forces you to grab the mice one certain way, otherwise it slips. Another thing is that the plasics that the sides are made from isn't grippy at all, especially if you have sweaty hands. The sniper button is completely useless - it's hard to press, slippy and just makes you loose accuracy if you want to use it. The back of the mouse is too heavy too. I've actually had to remove a piece on the left along with the sniper button and another two buttons in order to make it comfortable. I've also made cuts on the back of it and the right side and stuck a grippy tape on the left. Now it's usable but still makes my hand tired after long time of use. After I went to my friend and played CS GO with his cheap microsoft mouse on a s*** surface I understoon how s*** ergonomics this mouse has.
4357201
Great mouse, but the keyboard is not great.  Keys have to be pressed harder to register.  The "enter" key is not big enough either.
1809402
It's a good mouse but it disconnects every 5 min of not use. Also, sometimes when I'm using it, it disconnects and connects again
1671384
Left and right clicks are good but the sensor in this is TERRIBLE. Ton of acceleration as well as it spins out. Razer, please stick to the deathadder sensor its way better. I get that they are trying to pull off marketing bulls*** with the 16000 dpi but really this sensor is terrible.
602767
Since Microsoft quit making the Intellimouse Explorer 3.0 I was on the hunt for a mouse that fit well in my hand and didn't feel small. It's shape is good for people who have bigger hands and have to put it bluntly a ham-fisted grip on stuff. I primarily play PC games and browse the web with it. Even the extra buttons work well on Linux to. Every distro I've tried.
2163796
Been using this mouse for 2 weeks. Primary use is at work.
The good
1) Mouse tracks well on the surface.
2) No lag and responsive to clicking.
The Bad
1) The smooth finish seems to make the mouse slippery and difficulty to hold on to. Not comfortable to grip at all.
2) Not sure why, but ever since I started using this mouse I have started experiencing some finger pain. It feels like my fingers are always in a stressed position when gripping the mouse or when clicking.  I thought it might require some adjustment period, but its been 2 weeks and it does not seem to be getting better.

Ergonomics is a personal thing and there is no one size that fits all. In my case the mouse isn't a good fit. If I had a redo, would not buy it again.
1640939
It's okay to say the best. I like the sensitivity control and buttons, and the ergonomic design feels really good in the hand, but it's just over all not good. It's kind of glitchy moving around, skipping now and then. Razer synapse is a pain, even if you get it to work. But by far the worst thing about this mouse is the essentially false advertising. I bought this mouse because it was a wireless gaming mouse. The charging dock seemed cool to begin with, but I found out that you have to sync it up to the charging dock, not the computer. So in order to use your "wireless" mouse, you need to have an over six foot long cable with the charging dock stuck on the end connected to your computer. Certainly NOT for laptops, and even debatable for desktops. You'd be better off to just use the wired mode, but you still have to deal with that 6 foot long cable.
4143585
It worked well for a while, but then everything double clicked. When i right clicked, it would right click twice (the actual mouse would only click once but the computer registered it as twice), when i would scroll click, it would click twice, etc. A basic iBuyPower mouse for 10 dollars has lasted longer and fits better. No need for that "gamer mouse" look. For a cheap mouse, that just makes it bulky and awkward.
3364295
Good mouse, connected easily but it is a little picky about the surface you use it on.
964693
I wish it was a little bit larger in my hand.  The DPI toggle button is just awkward to reach and requires way too much force to hold down to be comfortable.  But as a regular mouse, it is nice enough.