Summary: Very expensive for what you get. I wish I hadn't bought them. If you fall asleep on an overnight flight and the headphones touch the seat headrest the headphones switch off and you lose the noise reduction feature. A poor design feature. So not a good purchase for travel purposes.
Summary: So you pay close to £300 for a set of wireless headphones. Good points: - The sound quality is good. - The wireless feature is great. - They're very comfortable. Bad points: - There's a lack of control buttons to make sense of the features. For example, to turn the set on you have to hold play for 4 seconds, to activate Bluetooth you have to hold down play for 5 seconds. - The don't feel robust. -The surround sound feels like a wasted feature.
Summary: It has taken me some time to come to a conclusion on the Sennheiser MM550X. They are a bit of a Curates egg, good in parts, as they can be Bluetooth, hard-wired, have Noise Cancelling, Surround sound and are extremely portable. The Noise Cancelling and Surround sound, are bluntly, not very successful, but overall, the portability, lack of wires and very acceptable sound, makes this a purchase, I can recommend. However, it is very expensive.
Summary: The side buttons are hard to find when the phones are on your head. They are not in any intuitive place. The quality from the phones themselves is disappointingly dire. The noise cancelling is OK. Sennheiser are one of the best headphone manufacturers in the world, of that there is no doubt, but they have gone wayward with this set unfortunately. Maybe the Mark 2 will resolve these issues.
Poor durability: does't travel well: headphone band snapped after < 12 mo
Amazon Customer "Julian @ Julian On Software", Amazon
21 April 2014
Summary: These were a gift for my wife who loved them but when they died before even a year was up, we were very disappointed. I myself found the sound pretty basic. Something like the Bose QC3s as reference (though wired) are vastly superior. Also battery life was only a few hours: not up to scratch for long haul flights. Now we're in the market for another pair and unfortunately cannot recommend them.