My airline (A320 family) has Sennheisers. Not sure of the exact model number, but the latest ones, starting to appear in flight decks across the airline, are absolutely appalling and a massive step back from the previous ones.
The microphone has to be pretty much touching the lips for it to be audible (at which point the sound then becomes scratchy) and the intercom volume has to be ridiculously high. The head-band looks and feels cheap and uncomfortable. And when you take it off, you're left with big dents in the side of your head where it's pushed against your sunglasses.
Considering the amount they must cost, it's pretty poor.