I've had the Bose X (high impedance) for over two years and wouldn't trade them for anything.
Also, regarding Bose as a company: I ordered the new battery pack/cord from Bose, which now is standard on the new X's (slim, automatic battery shutoff). They couldn't fill all the orders initially and after about 6 weeks, I received a box in the mail from Bose. It was a new QuietComfort stereo entertainment headset. Now I was really mad - this is not what I ordered - until I found the note in the box that said "sorry for the delay in your order, please accept this gift as our apology" or something of that sort. They gave me a free $200 headset (with ANR) because they were slow filling my $98 order. I was forever sold on the company.