I ordered this mouse in exchange for Sensei whose size and touched did not suit me. For this model, the hope was to find a model of reduced dimensions for younger hands, combined with a feeling more "Razer" (ergonomics, soft click with feedback franc). The Orochi 2013 could have been better in some respects: - The affected matte plastic little bewilder those who used the old models razer soft touch rubber. - The design of the lower part does not favor the taking fingertips. Specifically, it is not easy to raise the mouse (to center the cursor for example) without pressing the side buttons ... it does not interfere with anything in the conditions of every day, but such games starcraft , this is embarrassing for concentration. Moreover, the affected and / or quality of the side buttons done work with the rest. Finally, the connection system to switch to wired is not designed to be easily removed pure. The micro USB socket is provided with non-return lug forcing strongly pull the cable up and out, not very sustainable in my view, even if the cable and braided. No rating on autonomy, access to the battery system is nickel (magnet), a rechargeable battery cable would have been easier for the user. Apart from the side buttons, the overall quality is there. For those looking for a mouse for little hands, the Tanpaï seems to be a very good compromise.