The issue with the M200 is the p**s poor QC. For a IEM that's not very common, to have 4 different head'fiers and a customer on amazon have issues with the left and right LF driver going out on them and within days and weeks is a problem. Regardless of how awesome they sound, and yes they sound FANTASTIC! Reminds me of all the QC issues with the RE0, which turned off a ton of people and devalued their worth. KEF M200 is the same way. Great sound. Shoddy QC.
I know more than four people (counting myself) who haven't had a QC problem with the M200.