The mouse is smooth and fits your hand nicely, the lights are so cool, there's a forward and backwards button on the left side and a up and down button for the speed of your mouse - I keep mine on 1800.
The mat is very fin, has a cool pattern on the front and it doesn't slip, its defiantly better than just using my wooden desk.
The tron line effect thing only works best in darkness as you would of guessed. If you leave your mouse in the same place for a few minutes then you get a dot that stays there for a a minute.
The packaging was very cool but it was very hard and frustrating to get the mouse out, the wire of the mouse seems like its made out of something that wont tangle very easily and it is a nice lengthy cable :)
The Flaw that everyone seems to hate is: When you turn your pc on the mouse makes a dodgy corny noise sounding like its engine is starting up lol, first time i heard it i wanted to turn it off, it makes it look like a cheap and tacky mouse now because the sound is so bad it sounds like a 10p toy, you can download the drivers that come with a program for the mouse where you can choose which lights you want on or off, i keep all mine on cos i think that makes it look cool but there really should be an option in the program to turn THAT SOUND OFF!
but overall this is my first razer mouse and i instantly could tell the massive difference in game, i played blackops zombies and it was a lot easier than my normal mouse i swapped :)
The only reason it has 4 stars is cos that crappy sound took away the 1 star, if it had no sound or a really awesome sound instead then it would be 5*, i'd still reccomend it though.