This are an upgrade to the mk2 with better bass texture and better soundstage and intrument seperation, the midrange is more foward and natural sounding then the mki a.k.a the original. I think only 4 ppl have them but all of us should spread the w9rd about such a wonderful iem to everyone on other thread . I usually troll other thread and mention these and some gets interested in them and order them, so probably there are more ppl the we think and some doesn't believe in burn in so they usually miss the change on hearing such afe wonderful sound iem that them make judgement on open box and they say that it sound ok and soon enough sell it, some ppl give the only 100hr and say that it didn't make a different and sell them , but they really do change and becomes a truly wonderfully beautiful sonding iem which to me sound better the all my other iems and they are so natural sounding that I know they will not be able to replace them in a while, maybe when the dual dynamic driver gr07 comes out
What you are saying above about burn in is also so true. When I first got mine, I knew the potential was there, but I wasn't feeling quite as wowed by them as I thought that I should be. They have really changed quite a bit with burn in though, and now that mine are near the 300 hour mark, they are wowing me whenever I put them in.