This post is based on a review I did for Amazon a few months ago. I have updated it slightly for the blog.
I have owned the CK7 (which is made in Japan!) for about a year now and I am still blown away each time I use them. I have owned about 20-30 other canalphones and the CK7 is my absolute favorite. The highs are sparkly and beautiful, the midrange presence is fantastic, and the bass has great impact without being "boomy" or overwhelming. The attack is excellent and these are great for rock or metal since they can keep up with a double bass. I also use them to listen to Jazz and classical music. On a high quality recording you can even make out the impact of the piano keys or the fingers strumming the guitar strings. Wind instruments have a fantastic airy quality, usually only found on more expensive headphones or speakers. They do not have a warm sound but are better for it since they are precise and technical.
The CK7 comes in a beautiful titanium housing that looks great and really protects the delicate drivers inside. I take good care of my electronics but they still tend to get tossed around since I use them almost every day. My CK7 has held up extremely well and looks as good as new.
Also of note is that the CK7 has a "Y" shaped cord unlike the "J" cord which is popular with manufacturers these days but generally not with consumers. Included in the package are 3 sizes of tips and a thin leatherette pouch.
All in all anyone looking for an amazing pair of earphones with fantastic sound and decent isolation should check these out. You will not be disappointed.
Just note that directly out of the box the CK7 can sound a bit harsh or shrill. Give them some time. The drivers need to be burned in, and after a few days of use they will really come into their own. You may want to let them play overnight before using them the first time.