Ive introduced 3 friends to this brand. I wouldnt be surprised to see a slight sound quality improvement with an external DAC & amp though. Heck, its a great bike anyway. The swivel mechanism is excellent. I wanted to find the best speaker that fits MY listening profile. Phone was not unlocked could it use it Have bought this perfume before from a reputable department store and the smell lasted a long time. What are those issues?1. It is very comfortable, easily put on solo, the tension adjusts using the side pulls and the build quality seems excellent and should last a considerable time. Also diesmal keine Enttäuschung