I had a problem with my original Lachesis and I contacted the seller, but they did nothing. I contacted Razer and they sent me a new one rather quickly. I have yet to encounter a problem with it. Thank you Razer for standing behind your products.

I bought this mouse a while ago and LOVE IT. The sleek design, programmable buttons, the feel of it, the way it slides over my mousepad, the lights, everything is great.I love being able to save the settings right on the mouse and the dpi switching buttons. I have a different dpi mapped out for normal use, rpgs, shooters, sniping, and photoshop. The only con to it is that it might take a while to get used to depending on the mouse you're coming from. I can from a palm mouse and I've found that the Lachesis is more of a finger mouse. So you just use your wrist and finger to move it and dont really touch it with your palm.

This mouse is Amazing. i use the Pirahna Headset, The Tarantula, and the Lachesis and all together they are all amazingly powerful and work Great for any RTS and FPS as wel;l as RPG lol BUt they are amazing every way.

I have been using the Razer Lachesis and i have to say its awesome. My hands are medium size and i use the claw grip style and it suits my hand perfectly. Its slightly bulky on the butt tho but it is alright once u get used to it. Accuracy wise its extremely responsive and points where ever i want it to point. I have been improving my kd ratio in fps ever since changing from my salmosa, which was also very good as well. A few minor complains though. The drivers isnt that well made as the other mouse drivers. 2nd, very seldomly it stops responding in a certain direction for 1 or 2 secs, but that occurs very rarely. Btw if u wanna get the lachesis, make sure u are not using a soft pad (im using the goliathus now) it starts jittering whenever u apply slight pressure onto it. There wont be any of that movement if u are using it on a hard surface. I am aiming to get the razer sphex. It will be great if razer would make a right handed ergonomic mouse specially for claw-ing. It be lovely. Overall this is a great mouse and definately worth the price. Good job Razer!

I recently purchased this mouse and all i can say is that is beyond epic. I use it on my home machine without any problems.

I strongly feel that this mouse is so good that i would be willing to get another one for work if it wasn't such a waste of its potential.

Thanks Razer for making a mouse so amazingly epic.

I literally spent a whole ten minutes just marveling at this mouse's amazing design. The curvature of the mouse fits my hand perfectly, left or right. The quiet blue glow just adds to its sleek shape and darkness. The side buttons are very useful, I use them more than I use the respective keys on my keyboard. Besides the beautiful design, the sensitivity is ridiculously accurate. If i want to make the tiniest movement, the mouse senses it. It never misses a movement, so its great when playing FPS or RTS games that need rapid movements and clicks. It's by far the best mouse I've ever used.

I've only been using the Lachesis for a couple of days now, and it's fantastic. It glides across my mouse mat (unfortunately I don't have a razer one yet) extremely easily, I can move the mouse just as easily with just one finger. It looks good, especially the glowing razer logo, it feels good in my hand. I can switch hands if I ever want to (I'm left handed but use my mouse with my right most of the time). And the profiles are fantastic, I have it set to be my media controller during non game play, and then I have it switch when I run Crysis and other games. Truly an amazing mouse.

Higher DPI doesn't mean faster cursors, it can mean that, but you could always turn down the cursor speed, so it can either increase the precision of your already used speed or lower the amount of distance it takes to move the mouse around. (The ladder is best achieved with a higher friction mouse pad)

I've been using a Lachesis for about a year now and it's an amazing product, the configurable buttons are very useful, well, at least the left two and top two are, the right ones are for left handers, I assume. (Though I am left-handed, I hold the mouse with my right)

The only improvements I can think of is more button options, like the ability to set a button to toggle a key held or unheld, or to have the latest drivers fix" reverted which makes it so keys assigned to mouse buttons cannot be held but instead repeat destroying my ability to use the mouse to sprint crouch lean and so on.

Now that I think about it the scroll wheel takes a little too much pressure to click down but I have the top front button for that.

The design of the mouse is beautiful if I were a little kid I would likely play with it as if it were a spaceship it's pretty cool looking and it feels really comfortable.

It's a very good mouse I'm very satisfied with my purchase.

Well I am owner of this wonderfull peace of device already 10 hours.

I can say a real testing came in last 2 hours of my gaming how in public servers the same on some private 'match' servers etc...
I'm a gamer not some professional since it's hard to travel arround the world bcs. of so many reasons and main one is my country Bosnia .. :)
nvm on that MOUSE IS GREAT!!!

Yeah but if u ask why I rate it 4 / 5 stars it's only one reason.. I find some strange ' bug ' or error which I hope so will be really fixed soon with some newly drivers I have 1.10 drivers and firmware update 1.91 I didn't notice that this repeats often so that's GREAT! But it happend 2 times till now NOTHING SERIOUS THO cuz u will not regret any DOLLAR of this product if u buy it.

IT NEEDS - some time to adjust sensitivity it's little hard to do it (if u had previously some different mouse and less good then Lachesis like I had MX518) .. but belive me if u manage to finalise that u will be 1337 GAMoR arround ...

Also the feeling and ergonomics are really good after 2 - 3 hours or if u want 1-2 days (that would be max I supose) u will really get used to this mouse and enjoy it 2 max.

4000 DPI ... wow man... it's MUCH but u will not use it :D :D so don't cry for more DPI at ALL!


It's longer review but it's a first one from me..

I'm now proud owner of:

Lycosa Lachesis and Goliathus mouse pad... THANK U RAZER TBH. these things ROXXXXXXXX!


best combo ever!
cheers -- keep up the good work (and some less expensive products :P )

I have had this mouse for about 6 months and its the best mouse i have had yet. Anyone looking for a good mouse for games like crysis or wow stop looking grat mouse