Logitech is Relaunching the MX518 Gaming Mouse (venturebeat.com)
From a report: Logitech has announced it is bringing back the "legendary" (the company's word, not mine) MX518 gaming mouse. The announcement says "many consider [it] to be the finest gaming mouse of all time." I am definitely one of those people. Logitech first released the MX518 in 2005, as the successor to the already-pretty-good MX510 gaming mouse released in 2004. The MX518 was around for six years before Logitech tried to replace it with the G400 gaming mouse in 2011. I say "tried" because, well, it just wasn't the same. Logitech has finally admitted as much, after eight years of trying. The company is promising that the reborn MX518 will have the same shape and feel as the original. The materials have been updated, and there's a new "Nightfall" finish but, crucially, it's still an MX518.
Now that I already invested a shit-ton of money in a lightspeed pad and mouse, I sure as hell am not going to buy another mouse.
Not to mention that lately only chinesium crap came out of Logitech. I can buy honest chinesium crap for a fifth of the cost and have the same user experience.
I used to play FPS (Counter-Strike) and RTS (Star Craft) competitively and in such situations mouse quality matter a great deal. RTS in sniping situations your mouse makes a lot of difference in your time-on-target. For example, if you try AWP whoring with a $10 mouse, you are likely to end up getting out-sniped by players with AK. There are also some circumstances in RTS where mouse matters - high CPS unit micro just isn't possible without gaming mouse as you end up clicking faster than $10 mouse button could reliably register.
However, for generic gaming, like playing anything single-player or grinding MMOG gaming mouse doesn't make that much difference.