We now use regularly for about 3 months 2 glasses of this type. The Brillle is charged quickly, keeps the battery life what Panasonic promises. Charging is via USB. Even as glasses income is this about the "normal glasses" to wear without problems and disturbs not even after 3 films. We are extremely satisfied and would buy these glasses again. We use the glasses along with our Epson 3D home theater projector. So 3D is really a treat.
Update 11/10/2013: - For over a year we use this 3D glasses regularly and are still very satisfied. - Battery life is still amazing hitherto could find no performance degradation.