This is their "testimonial"!
"For Attention Sales and Marketing Manager. I recently purchased a RO water system from your company. I would like to express my thanks and Pratitude to you most kind and helpful telephone staff. I had occasion to speak with your staff twice and each time found them to be so helpful and polite. They are a credit to your company. Also Chris ( I think) in technical was most kind and understanding. You provide a wonderful service and I wish you and your staff continued success. Thanking you. Paul Cunningham, Galway, Ireland."
You should get your well water tested at a reputable independent laboratory. The test should include bacteria, general water chemistry (pH, Hardness etc) and metals (Iron, Manganese etc). You should show the results to reputable water treatment contractors and get detailed quotations for the work they propose to do. You should check with neighbours and choose a contractor who has a good reputation in the area and is prepared to return and adjust/service/upgrade the system if necessary.
I am not convinced about the science behind the electromagnetic device featured and would be sceptical about how effective it is.