I see this other review on here and i see that its only been given 2 stars, just because of the software on a mac, i have an acer gaming pc and it works amazingly!! Its smaller and it has a much nicer feel in your hand than the first MMO mouse. The buttons are very easy to press and the software you download from the SteelSeries website has been simplified. The backlight function on this mouse is very cool, its sharp and bright in any colour and its very eye catching. I am very truly happy with the cost, feel and functions of this mouse. Thats why it has 5 stars and i would recommend this product to anyone.