If every RBW got this problem, Razer wont survive for so long.

Kinzu v1 is definitely on the list due the worst sensor known to man and crappy switches which fail me after 2 RMA
Kinzu Red is slighter better with OMRON switches but the sensor is still the same crappy one.

Kinzu red will be in my neutral list so it the Xai.
Xai has a good sensor but the side buttons are too small and awkward to reach while gaming and Steelseries software is horrible to program the mouse.

But Kinzu have one very strong point that is it's shape, It's the perfect claw-grip mouse.
I tempted to build the legendary Kinzuadder(mutant of Deathadder internals with Kinzu casing)

CMstorm = Sentinel Advance?
I haven't test that but it would be in the horrible list due to the Philips twin eye sensor.
There are others that I've not tested but probably be on the horrible list such as the Imperator 4G and Lachesis
Cooler Master only makes one good mouse that is the Spawn but it's strictly for claw grip users only.

true as a fro bro. this is the one at home. tomorrow i'll take picture the one at office. a few more left at home in KL.
alor setar home - razer naga epic, razer abyssus, goliathus extended and carcharias (since i play MMO)
alor setar office - razer mamba, razer anansi, razer scarab (i play fps at office lol, so can   minimize window anytime and doesn't affect my gameplay status unlike mmo)
kl home - razer lachesis, razer sphex (rarely use them so i left at kl)

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Added on September 10, 2011, 11:16 pm seriously i like razer naga epic over my mamba for mmorpg as well as other games (including some fps). i'm using palm style and ocassionaly claw.

"Gaming" headsets are rubbish compare to Audiophile headsets in the same price range.
HD555 and AD700 are great headset for gaming.

The BWU lower area also finger print magnet, have to wipe it off with spectacle cloth after use everytime.

Is buying Razer Mamba 4G worth it?  

and that cost a lot by shipping zz