Pros: Large number of programmable buttons. Well made. Many performance options. Excellent for performing word-processing functions. (Yes, you can turn off the lighted logo.)

Cons: The two buttons below the Tilt Wheel are a little close together. As my finder moves from the wheel to the buttons it is difficult to feel where the second button starts. This is a minor annoyance.

Overall Review: WOW, this is the best mouse I have ever used. I use its many programmable buttons for writing, ie opening files, folders, programs, performing frequent word-processing functions, etc. I have not found a task I cannot perform through one of the buttons. There are multiple profiles available so for my purposes the available options are more than I think I will ever use. I thought the 12 buttons on the side might be difficult to remember, but they are ease to distinguish by touch. So, a big thank you to all the gamers whose requirements made this great mouse available to the rest of us.