What I blame this product is that it does not fit fully in the Magic Mouse. This means that all battery "glue" not in full. This causes irritating disconnections mouse. Just put the mouse on its back and it shows to the eye nu.Quand I'm me insight that I had to force with a slide the battery pack to settle properly into the mouse so that it locks. This should not occur and the unit should be better adjusted. For the rest it's true the product is very good and now works properly Well, That's it, we are in August 2013, the product was bought in January and it no longer works. Permanent disconnection of the mouse does not work for or so and it's even more frustrating, abominable slowness of the unit. Must be 30 cm on the desktop to advance !!! 3 on the screen. Fortunately I kept the original mouse at Mac. I ask myself the question of the guarantee of the article. This is a year right? In principle !!!!!
