Good to hear all sides of these things. I suppose you are referring to
any of the types listed. I know getting a good hot shower may be too much to ask for, although w/my setup (external gas heater) I can do that, but, at least not having to brave a cold water shower would be a bonus!
However,with the winter months coming I know up north on some days the water will probably freeze! That is not as problem where I live as even a pressurized 100' garden hose, laying in the sun, will provider a great hot shower before the water runs cool...