Bought myself a pair of the red CKMs a couple of weeks ago to use in the office, and I have been loving them. They sound great out my Leckerton UHA 6S - ohhhh, that bass! Meaty, visceral, ample. Basically all that I was not getting out of my old Meelec earbuds, and more. As others have noted on this thread, the mids are great, and soundstage is quite nice as well for this price point.
Of course, they do better with some genres of music than others. Electronic, rap and anything with a big bassline sounds just great. Is there too much midbass, as some have noted? Not to these ears, but I'm a bit of a basshead.
Case in point, TNGHT- Higher Ground (1080p, please!)
It does pretty well with guitars too. Ali Farka Toure sounds verrrry nice, with just enough bite to the strings:
Ali Farka Toure - Savane
Vocals? Yessir!
Joan as Policewoman - Flushed Chest
Jonathan Johansson : Aldrig Ensam
However, classical is just a no-go. Too congested, and for some reason, the soundstage narrows way too much. Like listening through a cardboard tube. With that said, it is still the best ~$60 I have every spent on iems.
Oh and, how about some appreciation for the packaging? Opening up the package is like some elaborate origami puzzle box, one tug and everything elegantly and effortlessly unfolds - now that is some seriously well-done frustration free packaging!
EDIT: corrected model name