Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Produced shoulder strain
Review: I had hoped to use this mouse for times when I have several days of click-drag-release activities. Because your grip is a couple of inches higher than on other mouses, I experienced much shoulder tension. (I saw this problem mentioned in another review also.) Perhaps with the right desk setup you can compensate.Also, I find a stationary mouse such as the thumbball or the Logitech Marble Mouse provides more exact mousing for me.
