As already owns the little brother, the Z5500 from Logitech, I needed a kit from the perspective of a home theater + xbox360. And what a surprise! I read several negative reviews for this kit. Well, we must obviously have an opinion be even! Even with a subwoofer that has decreased in size, and keeping the default settings, the Z5500 Z906 surpasses. Well we lost the particular screen indicating what type of audio is decoded or remote control we have reduced to a minimum, I can not criticize this 5.1 kit ... I am totally satisfied with my purchase!