Sound class, unstable Bluetooth connection prevents the enjoyment it

The JBL usual quality sound is very very good, no question. However, the Bluetooth connection when the ordered me headphones was vulnerable or unstable. Even in the breast pocket of an ordinary business shirt with thin fabric it very often came to disturbances during the music playback (partly even after a normal head turning left or right about the pedestrian crossing). Also, if you held the iPhone in your hand and it moved back and forth while running similar to the natural hand movements, already arrived the misfire when the hand laterally moved backwards. The range of the connection is not so, as I have (I order almost every year due to the frequent use of new headphones) expected from my experience from other manufacturers. I have the headphones ultimately returned. A subsequently acquired competitor product confirmed to me in addition to my experience with other similar products that the Bluetooth connection is either not fully developed or technically I had just caught a Monday device. However, on a second attempt I did not want to get it. When competitors product, there is little interference. And the range is about 2x as large. From the price-performance ratio not to mention. Too bad, I had initially really looking forward to the headphones, especially since I am thrilled soundwise of JBL. Only that's in such products not the alone decisive. What good is the sound when it is often disturbed and / or interrupted? Thus, the product is only suitable for the desktop, if you calmly sitting at the computer. But I certainly have not ordered me, but for the everyday 'rush' on foot and tram.