After I read all the positive reviews on Amazon on this flat antenna, I ordered the Selfsat because I wanted to use the connection at the window for me. In my opinion this construction, however, is highly questionable. At my window it is absolutely useless, because far too unstable. The design has some incomprehensible for me fallacy. The basic idea is good, but poorly executed. The lever arm is just too big and a second adjustable support would be appropriate here. Furthermore, some screws are not screwed in Phillips with the best will in the thread. The screw head of M4 x 10 is immediately destroyed because the thread is extremely stiff. The reception of the flat antenna is excellent and not complain BZU. I'm going to place the antenna on the balcony.