Don, the faucet in our head is metal, as is the flex shower hose, with only the shower head being plastic. It all seems quite solid, so just replacing the shower hose would be a good option for me, if Boater's World has the right one (it has to be an exact fit to connect to the existing tap, or I'll need to replace the tap as well).
We have only had our boat since last year, and as we are still a year from retirement, our trips to the coast where the boat is moored have been somewhat limited so far. Once we are living at the coast, we will be using the boat more than a few weeks per year, including anchoring out. At that point the shower may be very useful, especially for my wife as she doesn't like swimming in the ocean; I may use it to rinse with fresh water after a good swim.
So we have not used the shower yet, but plan to do so, especially in fairly warm weather when we can ensure enough ventilation to dry the head, so we don't create too much humidity in the boat.
We sure do like the E30+!!
Frank.