I purchased this mouse to replace an older Logitech mouse and have been fairly disappointed. Microsoft mice have usually been pretty good, but this one falls a bit short, I think.First of all, the right side button is completely inaccessible, unless you purchase a 3rd party flaming hoop and jump through it.The left side buttons are accessible, but not comfortably so.The biggest problem I've had with this mouse is it will periodically develop an electronic spasm when you try to move it, or it thinks the pointer arrow's active part isn't the tip any longer, but rather somewhere around the middle of the mouse arrow. On top of that, it takes three clicks of the mouse to accomplish one click while it is in this spastic mode (and no, this isn't battery related).I think Microsoft generally makes good mice. This mouse, however, is a specimen that necessitates the use of the word "generally" in that sentence.Do yourself a favor and get something else.