We hired the machine for personal use as a family experiment. It is too early to say whether the efficacy of the Brown's Gas on family members' health is positive. So our review comments here are reserved for the set-up and maintenance of the machine. The people at Osmio Water, Mark and Irina in particular, couldn't have been more helpful. And this was important as the Training Manual was at times unclear. In the event, Mark set up the machine for us and demonstrated topping it up. We picked the machine up from their premises, along with the Distilling machine. Overall, I like the machine, but there is a learning curve involved. Thanks again to Mark and Irina. I doubt without their helpfulness we would have persevered.