The quality is great. Have nothing to complain about. The opal diffuser can by not too much and not too little light. You can no longer see what was my goal, yes, but sees the colors clear and fed through the strips appear. It looks as if it would so or as if you could buy the set of LED strips and the profiles together. The Strips fit in perfectly. But you have aufwänden some pressure, which was not a problem. Ultimately, should sit perfectly in the track strips, too.
I'm really excited in every respect. However, what I would like to note is that the tracks appear much bigger in the pictures than they are in reality. So do not be alarmed if the package arrives! It has everything its accuracy.