QUOTE(stevenng97 @ Aug 18 2009, 09:59 AM)
for the example ? like jumping issue ?? i feel worried my lachesis will out jumping issue coz i go other country website those who r using the lachesis will out the jumping issuesÂ

The jumping/jittering issues occurs depending on the surface the mouse it being used on, and/or the way you hold your mouse. It doesn't happen to everyone.
If it's working fine for you right now, then good for you,
you don't have to worry about it. For the record, I did have some jittering issues with my Lachesis when I used a Goliathus Control Ed.
And yes, the Lachesis is recommended to be used on a hard surface. If you want a Razer pad, then get either an eXactMat or a Destructor. I've used my Lachesis on both, and I had no issues with either. Between the two though, the Destructor is better, and I'm still using it now.
Here's razersupport's reply regarding the Lachesis jittering issues on a softpad-
QUOTE
I do apologize that you are having trouble using your Lachesis with your Goliathus, Unfortunately the reason for this is because the Laser Mice (The Lachesis and Copperhead) are recommended for Hard Smooth Surfaces due to the precision needed for a Laser mouse, soft gritty surfaces like the Goliathus Control edition (The speed edition would likely cause less problems as it is a smooth surface) will cause problems. We recommend the Destructor Mouse Pad for the Lachesis and Copperhead (If you go to the "Gaming Mouse Guide" under "Products" on razerzone.com, pick "Comparison Chart" and then select the Lachesis or Copperhead it will recommend the Destructor, if you select almost any other mouse it will recommend the Goliathus due to the fact that the rest of our mice use optical and infrared sensors, which require less precision then a laser sensor. We recommend using Laser mice on a hard smooth surface such as the Razer Destructor.
I hope this puts this case to rest now. At least for a while.
This post has been edited by igor87: Aug 18 2009, 12:11 PM