The perfect mouse is an elusive creature for anyone who spends time in front of the computer. As a web designer I need a good multi-function mouse that has lots of programmable and convenient buttons. Hence my quest for a better mouse has led me to the Logitech Performance Mouse MX, and it was worthy of notice. I have found that when Logitech wants to do something well, they really pull it off, and the Performance Mouse MX is no exception. Featuring their new DARKFIELD laser technology, the unifying receiver, 7 programmable buttons, hyperfast scrolling, sculpted shape as well as a few other surprises along the way, this mouse is definitely worth a second look.