Just got one a few days ago. It's pretty decent. I'm mainly am IEM guy, but I wanted to start collecting a couple touted cans too. My brother has long had a K702 and has a Drop Panda too. I could say the 6XX is in the top 5 of the stuff I own, but it's certainly colored, forward, and has some limitations. I know the 600 is supposed to be more neutral. The 6XX is a little bassy, forward, has high level of detail but doesn't do delicacy well and is generally forward and small in sound stage because of it.