Don't believe the negative reviews this product has been getting by other people. This mouse is fantastic!
For under £8, you are getting a wonderfully responsive mouse, of which you can change the dpi without any software via a button on the top of the mouse.
The two buttons on the right hand side for web browsing are very usefull and fit perfectly with your thumb, whilst not getting in the way either. some people say you have to move your thumb to use both buttons. they are stupid if they can't figure out how to use their proximal phalanx (the middle of their thumb). There is also a rubber grip for you thumb to rest on while it's not in use, which is very comfortable.
There are grooves in the middle of the left and right mouse click buttons, which makes resting on the mouse very ergonomic and highly confortable when resting. it even makes clicking easier becauce your fingers do not slide anywhere. the groove is hardly noticable to the eye from the picture, so i thought this is something worth mentioning as it is one of my favourite parts of this mouse.
the wheel is completely silent and works perfectly as it neither too stiff or too loose - it's just right!
For gaming purposes, the ability to change the dpi is wonderful. if you prefer a lower sensitivity, you can change it to the lower dpi, and vice versa. Even during mid game it is usefull to change the dpi quickly for instance if during a game you go to control a turret, so you'll want a higher accuracy, you might choose the lower dpi etc.
some people are also saying the general shape of the mouse is only ergonomic for a chimp... I honestly don't understand that because it fits my hand like a dream and I have slightly smaller hands than most other people i meet.
Another thing that's definitely worth mentioning is that there are no silly drivers involved like some other gaming mice you'll find. this is a standard driver that works instantly with the mouse and causes no clashing drivers with anything else.
Overall, this is one hell of an excellent product, and I would certainly recommend it to anyone else whether they want a mouse for low dpi desktop use, or high dpi gaming, it's all good.
For just £8, this is probably a lot better than other mice at 3 or even 4 times the price. Really happy with mine!