Well, I was surprised to say the least. I think I'm feeling slightly changes in the sound, some tightening up here and there, but so far it seems to be improving somewhat.
I do like the overall clarity improvement, but I'm starting to realize that I might be a bigger basshead than I previously realized if I find the bass not that over the top as I've read some people say. I'm already afraid of the whole upgrade thing, since people are saying that LCD-2 and HE-4 only extends lower, not that it has more or even the same impact of the Pro 900. I got to admit that digiZoid ZO personal subwoofer is starting to look more appealing. What's wrong with my ears and why do I need more bass
About the whole comfort issue, I can safely say that for my ears with glasses on them as well, they're very comfortable with the stock pads.
One thing that worries me is when I'm putting the headphones on my head, the headband stretches and the section of the headband where the top pad resides stretches quite a bit, like if it was gonna break. While I do agree that the plastic does feel like it's the good stuff, that bending worries me.