I purchased my Companion 3 set in early December 06 last year. In mid November 07 they quit working. It just produced a very loud hum from the sub woofer. Since it was in warranty, I returned to Bose for repair. When the set returned, it still had the same problem. I returned again and they sent a new set which I received in mid December. This set lasted about 4 weeks and then developed a very noticeable 60 cycle hum from the sub woofer and a low level hiss from the satellites.During the time the Bose were out for repair, I purchased the Logitech Z 4's to hold me over and for under $70, they were amazing. The Bose are going out with the trash this week and the Logitechs are what I am sticking with from now on.