Summary: Simple and easy to install and operate. My only reservations - which are very minor - are that the clicking sound is a bit too noisy and the removable top (which is used to store the wireless adaptor) is a little bit flimsy. Overall, very happy with it.
Summary: Had a logitech mouse which died and decided to go with an HP as they are significantly cheaper...you get what you pay for. It does the job but uses batteries very quickly and has less precision.