Frankly impeccable (can be a good batch?)

I bought also the Panasonic RP-HJE125E and Sennheiser CX200 comparing ... well, there is no picture, the Panasonic (cheaper) is top both held view in the ear that quality sound. As for the Sennheiser CX200: background crackling whatever the device used; a disaster (note that the plug has a diameter very slightly greater that tends to "force" a little in the audio devices I own). Yet it is the brand we use at work and we were never disappointed so far.
In short, Panasonic without hesitation, and I recommend a suite to replace the Sennheiser.