Summary: 1. Razer Advertised the mouse of having a 1mm lift off distance. I can however slip 1 finger under 1 side of the mouse and it will keep tracking. This gotta be a joke, Razer! 2. This mouse uses the Phillip Twin Eye sensor. The mouse cursor will shoot towards the bottom right hand corner as soon as you lift the mouse. This will make you want to bang your head against a wall/desk/you name it if you ever need to lift the mouse off to re-position in a game 3.
Summary: I bought this mouse in September of 2011 - so it is about 6 months old now. I was very excited to get it and was rather pleased with it the first few months. It seems however that Razer product quality has hone downhill over the past couple years. After about 3 months in, I started having trouble with the software. The drivers are horrible and cause the mouse to be unresponsive until you unplug the mouse and plug it back in.
Summary: Not durable at all. Broke down due to clicks after almost a year, which is unacceptable for a gaming mouse. It is not ergonomic for people with short hands either. It should be shorter. I am very happy, that at least i got a replacement from amazon though, thanks to their excellent service.
Summary: Don't bother with this USB mouse if you're on Mac OSX. Using either Steermouse or USB Overdrive to configure the 9 buttons doesn't work due to vendor specific shortcuts in the USB standard. All I got from the Lachesis was an annoying acceleration and a frustrating evening of trying everything to configure it. Avoid.
Excerpt: 1. has excellent texture feeling, virtually anti sweat griptwo. mouse height is low, great for quickly aimingthree. 4 buttons total on each and every side of the mouse. 4. possibly nice sleek style. AT LEAST, it looks great.. 1. grip is seriously poortwo. way too slipperythree. button positions are in your way of your grip. you WILL accidentally click the extra buttons4. the buttons in your way make the grip feel Badfive. Truly Negative mouse cutomization UI.
Summary: This is a really comfy mouse, which fits nicely in the hand, has a nice finish, glides smoothly.. etc. However, as other reviews here and a quike poke around google will confirm, it's plagued by freezing issues, where you need to replug the mouse mid-game. Razer's own 3.xx drivers are to blame. There is no fix (even the power management fix that made their earlier devices work doesn't help here).