Most people writing reviews for this mouse have already raved about it- let me add my voice to the crowd.  I use a laptop for work every day, and always like to have a mouse as I don't like the eraser-head or the touch-pad nearly as much as an external mouse.  However, carrying a mouse around can be annoying.The Nano makes it less so- this mouse is ergonomically designed for true comfort.  My hands are fairly small, but I have no trouble reaching the very conveniently-placed buttons to navigate forward or backward, up or down.My favorite feature is the one-click button that you can press which will take you straight to your favorite Internet search engine!  This is a great feature when you have a lot of documents open already and don't want to minimize and go back to the desktop for your internet link!The mouse comes with a convenient carrying case, two AAA batteries, an optional desktop adapter and a CD for installation.  It is easy to install and takes absolutely no effort or reading of the instruction manual to work.  I am not at the forefront of the technological revolution by any means, but I enjoy comfort, simplicity and convenience in electronic accessories.  This mouse meets those requirements and for that, I would highly recommend it to anyone who prefers using a mouse to an eraser-head or touch-pad. 

Question: Where is the weight of this place?
Answer: people writing reviews for this mouse