#1440 reporting here! I've read a lot of comments saying that the bass initially seems weak and/or the treble sounds a bit bright (I'm at less than a couple hours of listening). The bass has not yet sounded inadequate at all. It sounds just about right. It's not as defined as I would have liked, but the quantity is just fine. The treble was ever so slightly bright on one track, but for everything else it sounds sweet and detailed. Vocals are so far their strength. I suspect that won't change based on what I've read.
On another point, I've never heard any headphone sound even close to as great straight off an iPhone as these. They obviously sound better off the BA/m903, but it's scary how close they can get in quality straight off an iPhone. These opinions may change of course.
So, out of the box, I definitely approve!