logitech... really left a nasty aftertaste for me.
Admittedly, I still have an mx500 that is almost perfect even now (after about 10 years I guess), just some switches have been opened up and bent a bit to correct the metal back into a decent click; though looks-wise.. the rubber coating is almost gone, the print on the buttons is, and the logo on the top is partially gone- that looks the worst by far.
So why am I hating on a company from whom I have my first decent mouse that after all this time is still functioning; because it is an 800dpi mouse yet that has the quirk that it functions as a 400dpi one without their funky driver, and seeing how they went and declared it obsolete.. they didn't drop a guy for two days on a recompile to 64 bit, thus in these times it's 400dpi only. And that's not what I paid for nor what I like using, 800 I could probably make do with, but 400 with todays resolutions.. not for me.
Also, the logitech scrollwheel. The. Bloody. Scrollwheel. "Scroll. 'what I didn't hear you.' Scroll again. 'Ah doublescroll you want, ok.' " Seriously.