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I Didn't think people still use such mice.
It was always a real pain to be connected to a wire and get tangled while working.
If you get yourself a normal USB or Bluetooth mouse then I see no reason to go for a wired one?
Curios why do you prefer a wired one?
Again if you buy a cheap one, then yes you'll have lots of spotty connections with the mouse.
Spend a few more bucks and you won't have to worry.
As they say you pay for what you get for!
For a laptop, wireless all the way. On desktop where the keyboard sits in its spot and the mouse sits next to it and the wires won't be in the way, I vote for wired, for the reasons I mentioned above. Also they seem to perform better (not a very significant difference, but enough to notice if you think about it).