The Razer Lachesis is an attractive gaming mouse with some very impressive features. First of all, the 4000dpi laser sensor, although this generally is overkill and unnecessary, half of that being more than enough most of the time. Secondly, the 9 buttons - two on each side, and 5 on top including on the fly sensitivity changes.

The shape of the mouse is odd. It's left handed, which it definitely gets bonus points for as I like to switch hands, but it arguably makes it less comfortable. Razer here have opted for a strange raised design that means lazy mousing is not an option here; you use your fingertips with the mouse held in a claw-like position. This takes quite a while getting used to.

The mouse looks quite attractive, with its glowing lights, in either blue or white. It's also quite a sleek, curved shape and certainly looks the business.

There are definitely some issues with the Lachesis however. Firstly, the initial drivers were terrible so make sure you obtain the latest from the internet. Secondly, the on the fly sensitivity changes don't work on one of the two computers I tried it on, for some reason. Razer support weren't very helpful with this. It also will suit some people more than others; if you can I definitely recommend trying it out.

The mousing surface is important here. I used your average cloth mouse mat and wondered why it worked so awfully. Turns out, you need a hard mouse mat or your desk. I opted for the Razer Sphex, probably the thinnest mouse mat in the world, which worked wonders.

Overall, this mouse is quite expensive considering the several problems it has. I would personally recommend you definitely look around and try this one out if you can, before you make a purchase.