Good value even with a few drawbacks
Crutchfield Customer Review (What's this?)
I agree with previous reviewers that the screen does get darker when the glasses are in operation but this is probably common to all active 3D glasses. One eyepiece lens is opaqued electronically so fast that your eye/brain can't otherwise decern the blinking. Same concept as looking at a bright light through a rotating fan blade - the light does not seem quite as bright as when looking at it directly. The glasses are light and you hardly notice that you have them on if you already wear glasses like me - just takes a little initial adjustment to get both pair lined up when you put them on. I opted for the replaceable battery model because I already have a few other items that use the same (commonly available) battery and it was not worth the extra cost and hassle to deal with charger cradle(s). Finally, I agree that it is a challenge to remember to turn the glasses off when you are done. The Red/Green LED pushbutton only lights for a few seconds when it is pushed so you need to push it at least once to be sure it is really off. Since I've not been using the glasses very long I can't comment on the battery life. However, I would expect them to automatically turn off when no Bluetooth 'switching" signal is being sent from the TV. If this is not the case or if the TV always maintains a Bluetooth signal even when not in 3D mode or when turned off, then that's something that needs to be fixed. Perhaps I'll experiment with this and post again.
Pros: Lightweight Fits over glasses Price relative to recharagable type
Cons: Power button must be pushed at least once to determine if the glasses are on. Perhaps a mechanical slide switch would be a better design.