I happen to be one of those laptop users that has just never gotten to grips with using the trackpad and buttons that are built in to the laptop, try as I might I just never found it comfortable and ended up clicking places I just didn't want to click!
Working in office using a mouse all day I came to the conclusion that I needed to find a nice compact USB mouse for my laptop, and My husband kindly bought me this one!
It's quite compact and feels a nice comfortable size in my hand although I imagine people with larger hands may find it not so great.
The wireless function is great as you arent attached with a wire to the laptop and as I'm usually up and down quite a bit when I'm using m y laptop it's good to be able to just pick it up and not worry about what's attatched on the other end!
This takes 2 AAA batteries and the battery life lasts for a couple of evenings use before having to recharge, which is easily done using the USB cable.