Razer will never disappoint you. Lot of companies do create profi-gaming hardware from time to time, but Razer is constant. I have Razer Salmosa for 4 and half years now and that's best piece of hardware I ever had. Tried Mamba, Deathadder and Naga. My friends do have them and all of them were using other (read Logitech) gaming mouses, and were reborn when Razer came into their hands. I must say that no one has ever made better piece of gaming hardware than Razer.
Others will maybe disagree with me, but I stand with Razer