The lenses can be adjusted very well, so that the image is very sharp. However, one must not be wearing glasses for short distances, namely the spectacle does not fit with underneath.
In addition, the headset sits rather uncomfortably on his nose, what long-term use difficult.
For VR experience itself:
The image resolution is still very poor with my phone (despite Full HD display) and you can also see the black borders around the image. In addition, many demos, which can result in combination with the uncertainty about bucking headaches.
But this is also not a professional VR glasses, but more to try a toy. And the experience is always impressive. Other, which I have brought the headset were very impressed and excited about what that everything will be possible.
Therefore for 23 totally worth it, as long as one has a modern mobile phone and is content with a few simple demos!