Worth the cost - advertisements hold true.
Shipping was quick and I received exactly what I ordered.
I have used this for a couple of weeks now. Compared to the old transparent tube type earpiece it is remarkably comfortable. The advertisements of no ear fatigue are 100% accurate. By the end of the day the back of my ear feels fine and I often forget the speaker is in.
There are no issues moving back and forth from a warm to cold environment- the tube styles had a tendency to get condensation and become unreadable. That is not an issue here.
The only issue I have ran into - which I feel is more of dialing in where it lives - is the small clip that helps manage the slack and keep the wire close to a persons neck. The wire will pull out before the clip pops free from a collar and it is a bit tough to get back on without taking everything off. Not too frequent. Just a note.