Just received these before heading to the office and have managed to sneak off and play some tunes through my iPhone 5. I have to say I like them a lot. I was impressed by the bass off the bat - nice punch with great texture. I also found the detail retrieval in these to be a good deal above average. These sound way better than what I paid for them...
I was worried that they would be okay, but nothing special as my only other single BA was a pair of Sony XBA-1IP that I bought and sold pretty quickly. They sounded really average - nothing to recommend them - they were competent, but boring as hell. I listened to some lossless Yes, Bowie, Talking Heads live (I love the Stop Making Sense disc) and some Dave Matthews....
Very, very pleased with these. I am using the large stock silicone and I think that things can get even better when I go home and try some tip rolling - I have a bunch of UE silicone and the above posts recommend them - we'll see.
Very nice packaging, looks to be built well and I couldn't be more pleased. Very pleasantly surprised with the quality of sound coming out of these little black blocks of aluminum.