I buy my Vizio VHT510 5.1-Channel Home Theater System via Amazon.com . the actual seller be GPCK INC , I think . as indicate in many product review , the lead volume indicator on the soundbar stop work in jun 2012 . when I call Vizio , they tell I that since I do not buy it from a authorized retailer , my warranty be invalid . therefore , they do not help I . even though I send they my original invoice , they say that GPCK INC should not sell these item . they do not believe that I buy it new , and they consider I that I be try to cheat . they admit that the lead issue be a known issue , but would not help I . -lrb- base upon the serial number , they tell I that they sell this item to Sam 's Club -rrb- I also call Amazon.com customer service rep , and they be willing to ship this product back , and give a refund . they be much nicer , and more helpful - not even comparable to Vizio . I really do not understand how a company -lrb- Vizio -rrb- can stay in business with such customer service . I would advise all of potential buyer to stay away from they !