In general, it will go, Substance over style, I hope g603 will live longer. I am supplementing the review after a month - THE MOUSE EATS BATTERIES AS OUT OF YOURSELF ! One AAA battery lasts for 2 weeks! I really regret that I bought it, I will have to buy batteries and a charging station (For comparison, the G603 was enough for 3 months - at least) Pros below: Good positioning accuracy. Possibility to use AA or AAA batteries, Miniature and rather dense, it will not be scary to push into a full backpack. Has some cons: ENERGY CONSUMPTION! (see comments) The mouse feels rather clumsy, rough, the same material on all sides, bends are minimal, ergonomics are not high, however, the mouse is too small to be ergonomic. I want to erase the logo, it is full of curves and complex, it looks unaesthetic on such a simple mouse. Very loud, ringing clicks.