The Naga has ever since it came out been an annoyingly hard to get out thought from the back of my mind and several of my friends. The buttons and the form looked great but none of us truely ever seen one in person before! I'm going to try and explain what this mouse is like to own and use in person clarify some questions I had before I bought it!

Pro's:
Make:
The mouse is exquisitely made. Every piece is put together exceptionally well! The only quibble one can have is on the back of the mouse, in the piano black plastic is the seam line where the bottom was either molded or glued together.
The shape is very easy to grip onto and the buttons are all extremely easy to reach and work, especially the grid I might add! Takes about 20 minutes to learn where the buttons are and such on the grid.

Functions:
The buttons are extremely handy already, they take over either the numpad or the typical number row on the top of the QWERTY keyboard. The scroll wheel has plenty of resistance but will move when you want it to, it will not scroll on its own or by accident... If you have absolutely brittle fingers ready to break at the slightest breeze I could see this being a problem, but rather the feel of it is great and the rubber coating is awesome!

There is a macro program which allows you to set 17 stroke macro's to any of the buttons, it's a bit tricky to learn on the software at first, but if you read the manual it explains it very well.

You have to go into a program to change the DPI, which goes to a retardedly unusable 5600 DPI. You can set Acceleration changes, Polling Rates, and variable seetings and sensitivity at which the mouse actives even. It's everything you'd expect software wise.
You can even turn the lights on and off!! The scroll wheel and number grid are the same light by the way.

Wired:
It's wired! Enough said, wireless mouses and keyboard suck, this isn't wireless, it's great.

Cons:

Make:
It is SMALL, I thought this mouse was going to be huge! But it is tiny, can hurt the wrist if you don't have a gel pad (I assume that would help because I don't have one yet) unless you can perfectly keep your wrist level at all times holding onto a very small mouse! It's smaller than a standard mouse even, and it gets extremely annoying after coming from an MX Logitech which is large and ergonomically designed.
It is -very- VERY light, it feels like the darn thing is hollow haha. There's no way to add weight to it so it is both small, and very light and poses an extreme ergonomic inconvenience. You can learn to hold it nicely after awhile but it gets to hurt anyways. A gel wrist pad should alleviate this and is.. Honestly why I am not returning it, as without one this could very well seriously cause carpel tunnel within a week I am thinking..
My hands aren't the biggest, in fact my hands are smaller than a bunch of my friends, and when they hold this mouse it actually has them flicking their wrist out and cracking it within 5-10 minutes.. Takes me about half an hour before it starts getting annoying... I don't think a highly designed gaming mouse should be this small and make a wrist ache so badly.
Though your fingers are extremely comfortable the lack of size for wrist support is just vicious! I've never had Carpel Tunnel before aside from a nine hour paintball stint holding a 12 pound paintball marker this mouse gets hard to hold after half an hour... Hmm.

Functions:
There's really no functional problems at all. If there is a functional problem, well it can quickly be alleviated by going into the software and BAM it's fixed. There is no functional problems here, if you are EXTREMELY small the ergonomic problems will mean nothing too!

Wired:
Dude, wireless things suck, get over it already. Wired is only a benefit for this mouse and ANYTHING else.

Conclusion;

This mouse is extremely good. Your fingers rest on it naturally within seconds, the first time you hold it and such it feels great! Within a few minutes though it starts to hurt... Ergonomic it's not the most amazing for an average sized user.
I'd recommend getting a gel wrist support, Logitech mouses and even my old standard microsoft one I could go on marathons of gaming some nights thanks to Darkfall back in the day and not a single ache but this thing.. Within minutes. It's just too small and too light.
This mouse suffers from over design, it's flawless, yet flawed! Function wise, use and such you could NOT get better than this thing! The buttons come in extreme handy, but its tiny profile and such can be a bother. I wish I could have held the mouse for 10-30 minutes before I bought it, I may have reconsidered... I would suggest looking through Razers product list before getting this, and purchase something considerably larger, and ergonomic! As I believe if this company puts their mine to a single aspect it gets done perfectly.. Though they may come short in other aspects.