i also use the Roccat Kone+ and mine has suffered the flaw of the Roccat Kone, the scroll wheel is broken and jumps like hell oh well
im looking forward to getting my hands on a Steelseries Sensi, looks like an amazing mouse
i have many mice, Razer Latchesis v1 red, Razer Mamba, Saitek Cyborg RAT7 and now the Roccat Kone+, the razer mice are very kit and miss, i hated my Mamba mainly cause the driver software for it was total rubbish