The Simple H20 system I have bought a year and a half ago! This works very well in fact. I purchased this unit from Pure Sense Corp. in London. The sales rep educated me more about my water quality in fact, my old system was a 4 stage with a uv light! And I paid $3800 at that time for that unit which I had for 4 years! Now I was a little skeptical at first, but still was curious if my old system was still good. In fact my filters were costing me more, because my TDS was higher. My old system was great but the Simple H20 7 stage tasted way better. Does not mean my old one was no good it just didn't have all that added protection. Where I live the water quality was horrible, I always had high blood pressure. Now I purchased both the 7 Stage and the conditioner and my family and myself noticed a huge difference. And I now no longer have high blood pressure the doctor said what did you do! I said nothing all that was changed was I installed the simple h20 system. The simple H20 system was more money but it does not use electricity and I save even more money because the last stage replaces what the uv light does anyways. This system does not use electricty. Yes it was a little noisy but I don't care the water quality is better. My old system I found out that all it did was remove everything but not put back in the minerals I am supposed to have. The simple h20 takes all the bad and puts the good back in! Needless to say it is well worth the money and everyone I know has purchased one! Yes there are cheaper ones but cheaper does not mean you get quality. I wish I knew that before!! Don't judge!! They have awesome 25 year warranty and 25 year service warranty which are transferible. Just listen, to the sales rep you will be shocked at the results of the water. Buy the system or at least condition the water with the unit or just the water station. Your call really, it is your health and you cannot put a price on health!! I bought both and very pleased with the system!! Enjoy!