Pros: sound great, easily transportable, easy to drive
Cons: weird feel on the ears
I actually got to play Santa at work and get these for a coworker because of good performance on his part. He was cool enough to let me listen for a while and I really liked the sound. I've never heard an open-back design before and I really liked it.
So I listened to some Heather Nova and heard a loop in Ruby Red that I had never noticed before. It was pretty obvious. I played other stuff too and all the music had more distinct layers than I'm used to. I've got some good AKGs and I've heard the layering that the NuForce Icon HD brought to those cans. I was impressed to see that I got pretty close to that feel with these Grados unamped. Quite surprised and pleased. The bass was also quite nice. Only a few high treble sounds were a bit sharp. Maybe some burn-in will help.
I think these are really neat but I'm still mixed on the sound leakage issue with open back cans.