These are wonderful speakers to use in a room where you want the speakers to fade away and be heard and not seen. They are best used in a room that is NOT your primary listening location where you do most of your serious listening. They excel in providing the Bose reflected sound, which is pleasant in all parts of the room and provides very good stereo separation from different listening points. There is no "sweet spot". In reading other reviews, I think some people were disappointed because they didn't realize what they were buying. These speakers are a satelite system. Essentially you can think of these speakers as two way bookshelf speakers, with a 5 inch midrange/woofer and a 2.5 inch tweeter. However, the Bose system mounts the two five inch midrange/woofers in a single "bass module" and places the tweeters in small cubes... And instead of including one tweeter, there are two in each cube and these cubes can be turned so that the tweeters can spread their sound. This makes the system very flexible. Just as with any reasonably compact two way bookshelf speaker system, if you want very deep bass for music, or good deep rumbling bass sound effects for home theatre applications, a separate powered sub woofer is essential. That said, in playing rock music at moderate sound levels, I find the bass satisfying and accurate. The bass is tight, not boomy. And not excessive. For very loud music and lots of bass, or for rumbling sound effects, look elsewhere
Pros: Very good sound, very flexible, good for a living room, dinning room, bedroom, or kitchen
Cons: This is essentially a two way speaker system with 5 inch woofers. It is NOT a system with a subwoofer.