I love my magic mouse. By default it might be a bit limited, but its potential is there. You can extend its functions using the free MagicPref software.
However, lately it has been disconnecting very regularly. It is irritating and inefficient. But i found a posting on the apple support site that has some suggestion. In particular, there is a setting that is rather hidden. Making a bluetooth device a favorite.
System preferences>bluetooth. Highlight the mouse and click on the little gear thing and select show more options. Click on the gear again and make the mouse a favorite.