Well, after my first major international flights (I think Utah to Croatia and back qualifies as "major"), I am an even bigger fan of my Ety ER-4P's. Whether listening to music or listening to a movie over the crappy airline system, they were amazing. Even without music playing, I was able to block out nearly ALL of the background noise. Not just the engine, but the guy next to me thought I was crazy when I mentioned at the end of a flight that its a good thing the kid behind us hadn't been screaming the whole flight. Apparently he had. Most earplugs have seemed to accentuate voices (and babies, announcements etc.) The Ety's just block everything out. The only real drawback might be that you miss the important announcements in addition to the annoying "on your left, if you could see through the clouds and didn't have 6 other people and a wing in your way, you'd see the Grand Canyon" type of announcements.
I haven't had a problem with compression or whatever with these either on numerous flights. It's not like having a cold. THAT really sucks. This is usually no big deal from a pressure standpoint. Often, I will simply disconnect the phones from a music source, but leave them in for takeoff and landing.