3 stars anyway as quality / price ratio (small quality but low price). At least compared to many competitors at low cost marking and order of folding and carvings is correct. Keeping the smartphone Velcro compartment are too powerful which frequently leads to the dismantling of cardboard withdrawal. The closure of the last elastic flap is severely inadequate. The lenses are a particularly poor quality (just look at the picture twice directly on the smartphone to realize). This device however can test the concept of virtual reality, external to download free applications are in addition to the basic Google app very poor. It was worth her chickens under.