I have just received my sennheiser 448s in the mail today (would have been sooner but there were some shipping complications). Right off the bat these headphones are very comfortable, much more confortable than my prior skullcandy hesh headphones. My ears heated up a bit buts thats not too big of an issue. The initial sound quality from my laptop and my ipod is great. I still have to "burn them in" which i will do soon. The sound isolation is good for not pressing against your ears like other headphones do. Bass isnt bad either but i will see how it changes as time goes on. First impression is very good.