Buy recommendation with restrictions

For several weeks, the charging cable (now my fourth) in use. The plug-in connection to the 12V connection and Navi is good. During the charging function to work properly, however, I realized that the TMC reception is in need of improvement as compared to the much more expensive original cables. Several times it took over 30 minutes, were welcomed to transport messages. Under options in Navi I could observe how unsuccessful the frequency search was also in a very good reception environment of WDR2, WDR4, 1live. So the RDS station detection were displayed but unfortunately skipped over again.
I will continue to use the charging cable, as it is an interesting alternative is priced. Whether it offers better value for money than the original accessories from Navigon, practice will show. But I'm no longer willing to pay about 30 for a Navigon original cable with a desolate connector.