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Title: HORRIBLE
Review: This mouse is terrible. I bought this when Microsoft discontinued the Trackball Explorer and mine stopped working. First of all, it is not comfortable or cool, its like a cell phone from the 80's 2) programmable buttons is a joke. If you want to program stupid buttons like "back" maybe, but if you are a hard core graphics person or a gamer, forget it. You can't program "enter" as a button, COME ON??? 3)The ball falls out, all the time. You basically need a separate desk for this thing is sit on....and maybe another hand to use it. 4) It is non-responsive, you set the sensitivity, it doesn't care, it forgets and does whatever, jumping around, stalling. DON'T buy this, I will sell you mine for $1 or give it to you if you have a Trackball Explorer. BAD BAD BAD 0 stars
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