Previously had the Sony TDG-BR200B 3D Active Shutter glasses. The glasses were uncomfortable to wear, expressed on the nose and behind the ears. After 15 minutes the movie experience was a torment. I then here at Amazon found the Sony TDGBR750 Active Shutter 3D glasses and ordered because of the good reviews. As usual fast delivery through Amazon and then "WOW" what a difference. The lightweight glasses, barely noticeable, the 3D experience fantastic. Despite the higher price just buy it !!!