I use the old 4000DPI Razer Lachesis with my Desktop and the Logitech MX518 with the Laptop.
Advantages of the Lachesis:
- The Lachesis gives me significant better hit rates than the MX518.
- Also the handling (relaxed hand postion, accurate and short button click, cozy haptic) of the Razer is better for my taste.
- The laser comes along with a wide variety of surfaces
- Well suited for bigger hands
Disadvantages of the Razer:
- Every driver is more or less a betadriver . . . independent from its version
- Once the driver even came with a trojan (directly from the razer server, thank you razer guys but my scanner ate it before it unpacked)
- Sometimes the PC does not recognize the mouse anymore --> unplug / plug or reboot
- The right side buttons are good for nothing. . . at least for my handsize