Atwood portable gas water heater/shower

First time I've seen one of these.




Product description
H2oasis hot water on demand water systemfeatures:

easy-to-see hot water and battery charge led indicators
shower head with 6-ft. Non-kink hose for convenient use
specifications:
power: 19, 500 btu
water temperature: adjustable up to 125(d)
flow rate: 3 l/s
ignition: instastart™ matchless lighting
fuel type: 16. 4-oz. Propane cylinder
runtime: up to 40 gallons of water
power source: built-in 12v rechargeable battery



https://www.amazon.co.uk/Colem…dpSrc=srch

As a backup, how handy would that be?

Or even a primary hot shower unit for a van-camper...

Looks good, I wonder how handy it would be to get the Gas Cylinders here for it.
The Reviews are very mixed about it.

Looks a good piece of kit. I could try and persuade the missus to go back to an air cooled VW now if she wouldn’t mind showering outside. The lack of toilet might still stop it.