Practical experience: To test the DVB-T receiver I have this antenna simply placed inside the window on the floor, so for a terristrische antenna a possible unfavorable situation. But the receiver has detected all channels with 80-90% strength / quality. Even if one takes the antenna and in 2m height rotating direction transmission tower, one has 100%.
According to DVB-T reception forecast we live to the transition region exterior antenna / roof antenna. Only that this antenna so obtained still good values in the interior, speaks for the product. Especially since the receiver was a cheap second unit only.
I give a buy recommendation and therefore uneingschränkte 5 Stars.
PS: In the instructions it is not recommended to extend the included cable. Better to buy a new longer (4-shielded). So Who 6m are not enough, a cable should also not forget to order.
EDIT: After 2 years of operation, my copy is still top. The second and third antenna deliver without problems and failures a great image. Especially nice the unobtrusiveness of this design and for aestheticians is far better than this sprawling crows perching older provenience.