+++ Love the comfort.
+/- Originally had trouble with the microphone.
--- Battery life is short, and doesn't have auto-off
I originally bought the Bose when I was doing time-building (6-10 hours a day) across the country. Today, most of my flying is flight instruction (3-9 hours a day).
COMFORT: The comfort is great. Without question, the most comfortable headset.
MICROPHONE: Compared to my old DC's the mic did not work very well at all. I talked to Bose about it, and they told me that the standard mic was a lower gain mic. They put a high-gain mic on for me at no charge, and it works great. (Don't know why they don't make the higher gain mic the standard). Anyway, I'm happy with the microphone now.
BATTERY: Takes a 9V battery. Battery MAYBE makes it 20 hours, but sure feels like less to me (perhaps the Piper Seminole has more noise than an average airplane, and the ANR has to work harder?). They don't recommend the NiMH batteries because they are 8.something volts and you don't get much warning when they get low on charge. I use them anyway (I'm either concerned about the environment, or too cheap to buy dozens of $2.00 alkalines). What I really don't understand, is why a $1000 piece of hardware can't have an Auto-Shutoff? It's a simple circuit, and would add negligible cost.
SUPPORT: Company DOES support their product. No question.