i think my G5's laser functionality is failing, as sometime the cursor not responding to the mouse movement. The buttons are responding to clicking, though. I tried it on my laptop, it also intermittently works well for awhile. I put it back with my desktop on different usb connector and on few occasions it end up with same problem. if i banged it couple times on my table it may work for while or couple days but then it starts to misbehaving again...

This post has been edited by retsnom: Mar 28 2009, 09:46 PM

I contacted logitech and my G5 pretty much confirmed faulty, would send for warranty later. Meanwhile i just bought Mx518 last week and so far so good.

G5 has several advantages over Mx518:

1) its scroll wheel has left and right tilting options which you could assign specific function to them

2) Weight adding functional provide more precise mouse/cursor movement control

3) Slightly higher 2000 DPI and clear indicator of dpi

Logitech Mx518 advantages:

1) Flip button

2) smooth plastic surface less like for dirts to stuck to it

3) better price-performance ratio compared to G5

Overall i it's difficult to find different in term of performance between the two mouses, they felt pretty same in my hand, and G5 is much more expensive.

This post has been edited by retsnom: Apr 4 2009, 06:14 PM

New Microsoft SideWinder X3 Mouse. Very affordable as well...

http://www.microsoft.com/presspass/press/2...WinderX3PR.mspx