My only concern is the durability of the filigree parts of the headband (the tiny fixation and also possible wear out effect of the elastic band in the course of time). That I can expect problems with the "high-end" cable is another concern, but if it fails it has to be replaced during the guarantee period.
These are all great concerns. What I can tell you is that we strive to have the best customer service in the industry. I don't expect that the headpad elastic or the fixation point will wear out or fail.
BUT, if they do, AQ will replace or repair. Even if your warranty is expired, we will help you out. To my knowledge, AQ has never turned down support for a customer with a failed product and an expired warranty...and that goes for products that are even 20 years old!
Regarding the cable, as others have said...it's fragile due to the use of large, solid conductors. Included with the product documentation is a letter from our owner/founder explaining why we included two cables. He basically pleads with the user to treat the solid core cable very carefully and use the backup cable for moments where rough activity is expected. What we have found is that some people are just really rough with headphone cables and others are really careful. And that's perfectly OK. It's just reality.
The same customer support applies to the cable, of course, and all aspects of our headphones. If ever you have a problem, we will help you...whether it's during the "warranty" period or 5 years later or 20 years later. And because I'm active here, you also have a direct line of communication with me in case there's something that our support just cannot assist with.
All of this is to address your concerns and hopefully eliminate any apprehension you may have about owning AQ products.
Perhaps it would be good to ask those in this thread who have had an encounter with AQ support to share their experiences...good or bad. If anyone has had a bad experience, now is the opportunity for me to help you make it right! If you've had a good experience, we all want to know.