TXFlyGuy
The CEP system uses replaceable foam earplug tips, threaded onto a small audio transducer (speaker). I find them comfortable for all day use. You may have a bit of a "comfort" curve, but when you get used to them they are great. Used in conjunction with a helmet they are very nearly as good as an ANR system, without the hassle of batteries and such. The ear tips (foam) are good for multiple uses, and when they need replacing it takes all of two minutes to do so.
They are effective, and you will end up using the lowest of volume levels on a typical audio panel. In an aircraft that you fly all the time it is not an issue, but you will very quickly learn to initially turn the audio down in unfamiliar aircraft. I guess this is because we do not recognize how much volume we use to overcome the ambient noise with "normal" headsets.
While I cannot comment on your question concerning this particular helmet, I heartily commend the CEP to your use. It is good stuff.