I had a road trip to a ribbon cutting for a maximum security prison today.
It was a perfect chance to use the P7 headphones on a road trip with five other people in a Chrysler van. It was a 3 hour and 20 minute trip. I've got to say that I found the P7 headphones to be very, very comfortable with enough external sound isolation to make the trip very enjoyable. I ran the headphones from an iPad2 and an iPhone5, and found that if I jacked the volume up just a tad more the road noise and passenger conversations were easy to ignore.
I did hear the background noise from people talking in the van, and I did hear some background noise from some incredibly heavy rain. But I can say right now it was easy to zone out, and the 6 hour roundtrip went quickly as I listened to my tunes. The only problem was the fact that the rural area we were traveling in kept me from getting online for over half the trip. No LTE or 4G in the boonies!
If you want total isolation then an IEM or a noise canceling headphones might be better for you. But for me the IEM's are not comfortable, and the noise canceling heap ones don't sound as good as the P7. That said I don't know if the P7 would be good enough on a an airplane when your sitting near the engines. On a plane I'd go IEM and deal with the discomfort. So, the P7s are not the headphone for all "seasons". But the comfort and sound make them worth it in all but really noisy environments IMHO. If someone can identify the "Holy Grail" of noise canceling headphones that are comfortable, and have SQ I'd like to by them. In the meantime I'll be switching out my headphones trying to meet the environmental and source demands.
The non-headphone lovers in the group thought the P7s looked fantastic. I suppose the earbud group thought I was just a bit weird. I brought my P5s along, but didn't try them. I suppose I should have, but I do believe the P7 sounds better and is more soundproof regarding outside noise than the P5s.
When I travel I'm usually the drive. So this was a very welcome road trip where I got chauffeured around for six hours and enjoy the music.