+ Is great in your hand + Very easy (even with 10h continuous use no fatigue or cramps) + Great mouse wheel (scroll mode for free) + 4th mouse button very well positioned (thus also in everyday use available) + Extremely cheap - Some models have fast times Monday a cable break (My first mouse for example., My second holds but for almost 2 years with no problems) Conclusion: In view of the tried by competing models (Microsoft, Razer, etc.) so far unrivaled good