I am considering buying Logitech G400 mouse. However, I heard that it is suffering from a tracking bug, as well as lack of sensitivity. Right now I own a Razer Krait mouse that has no drivers for Mac and 1000 hz polling rate just like G400, running OSX 10.7.4. However I experience none of these problems. Can anyone confirm or deny the existence of these? I have to point out that I am not interested in Steermouse/Overdrive solutions and my only tweak will be the terminal command to remove acceleration. Share your out-of-the-box experience, please.