The price may seem daunting, but it is more than justified !!! Excellent quality: The glasses are extremely light, the comfort top notch and the processing high class! In addition, the glass itself is extremely good and has at atmospheric, gently clean any micro-scratches on - unlike other glasses. This "looks" not one, but gloomy but always quality. The 3D effect (Acer P1500, Blu-Ray player and PC with NVidia GTX 570) is very, very good! Absolutely no Rainbow, ghosting etc. The technically induced blackout, I can not even see, it seems to me rather as if the picture is not dark, but as the contrasts would be even crisper than in 2D mode. The synchronization etc is always perfect, no crashes or retries during use. Full recommendation!