I have had this a little over a week now and havent had any issues. A little hesitant to buy based on some poor reviews, but for less than 5 bucks I figured worst case it would go in the garbage. One note for anybody looking, the sensor bar does not come with any instructions so I will summarize how I got mine to work. With the Wii off, I unplugged the wired sensor bar that came with my wii, inserted 4 AAA batteries into the wireless sensor bar, turned on my Wii, hit the power button on the front of the sensor bar and it worked right away! As another reviewer noted, range seems to be increased with the new bar.