Just got my cobra a day ago which i got mine from amazon for 20$ didn't feel like waiting long lol
And pretty much its a clone too the diamond back and it performs pretty good too.
The cord i like alot its very flexible and pretty thin.
Ony problem it seems like it has is the mouse wheel is a bit loose and moves left and right but works good might have too have amazon send me another one, But ya its pretty good for 20$ or 12$ on dealextrem.
Oh for got one more thing it does have a strong plastic smell too it which bothers me but hopefully it goes away after awhile.
And the side rails isn't rubber they just hard plastic was hopeing they be rubber but owell it still feels good and cant really ask for much for 20$
Heres some pics comparing it too my diamond back plasma ed:)