Tried them (Clarity Aloft) once and found them horrible. Slightest tug on the cable, they came out, I also found they moved about (in my ears) and the noise attenuation changed significantly. Also found it irritating to have these plugs stuck in my ears.
HOWEVER, I hasten to add that these were rentals and came with - new - standard foam insets, not the custom-made ones. This may or may not make a huge difference, but I don't think I'll find out. Went back to my Bose-X very quickly.