The other reviews are very confusing (cleaner dishes, better drinking water when the manufacture didn't claim that?) But here is what I found from my experience:1. I purchased a sb175 from home depot, and proceeded to find a 12 inch straight copper pipe. There ain't any. I had to drill a hope in my garage wall and locate a straight copper pipe. after that happened, I found the pipe was 1mm from a wood 2x4. I had to clear the wood In order to be able to wrap the pipe. This is no easy task because you can damage the pipe. That took a few hours. After wrapping the pipe which took an hour with double coils of 50 wraps, it dawn on me that this straight pipe goes upstairs and not to the water softener. Another hole was drilled to locate a second 12 inch straight pipe. This one is free and clear and clearly go to the water softener. I purchased a sb75 from amazon for the second pipe. It took another hour to wrap this. Now I got this covered. All the water going into my house (except those watering the lawn which branch off before) is now conditioned by scale blaster units.Lessons to be learnt up to this point: You must locate a 12 inch STRAIGHT PIPE from the pipes before the water heater first. This is no easy task for my house as my realtor cannot find the pipe map. I found the pipe that came in and after the shutoff were all buried under ground and inside the wall. To get conditioned water for the whole house I need 2 units the only straight pipe before the shutoff and branching off is underground and I wasn't going to temper with that.. I called customer service, they do not recommend using one box for 2 separate pipes.2. I turned off the water softener and bypass it after turning both units of scaleblasters on.3. I notice nothing changed in the subsequent 2 weeks, but for the fact that my hand feel sticky each time I take a shower. Customer service cannot explain this. I am beginning to feel this is like my electromagnetic wave roach repeller, which I turned off after 4 months with no benefit whatsoever and no way of telling if it work or not. But in this case there is more at stake, if it doesn't work, it can damage the pipes as I have now bypass and shutoff my water softener.4. I went back to the scaleblaster site and read they have been I business for 18 years without a bbb complain. So I gave it another 2 weeks.5. All the reviews about water soften effects and more drinkable water escape me. The company do not claim to soften water, it merely condition it and make it not adherent to pipe. So I don't know why some of the reviews say that. In short, it is not supposed to and it will not soften water. Nor will it take the stains off the dishes since the calcium remains in the water and when it dries, it will be on the dishes.6. After 3 weeks in use, I am beginning to notice there is a difference in my washing machine. My washing machine's cold water input was basically crippled when I first move into the house 8 months ago. It drips so slowly that it takes a few hours to do a wash. I was going to replace it but I think it could be the pipes were clogged and it will be very expensive to replace the pipes to the washing machine and I had no way of telling if the clogging would recur if I replace the pipe and the washing machine. Already a handyman wanted to charge me 250 just to replace a small section of the pipe leading to the tap for the washing machine.. So I was manually filling the machine with water. What the heck, each wash will be equivalent to working out in the gym for 30 minutes.After scaleblaster was installed, I decided to give the washing machine cold water input a try again. It was dripping a little faster the first try.A few washes later, I notice the time it take to do a wash has decreased to more reasonable level. Not normal yet, but manageable. It takes maybe 90 minutes now, and you can hear the water coming down during rinse cycle much faster than previously. (I use hot water for washing, and that has no problem probably because that was going through my water softener, but for some reason the machine won't turn on hot water during rinse cycles despite me setting it previously, but now it is set to cold rinse so more water can go thru to clear the pipe.I can only attribute this to scaleblaster, as this is consistent with what the customer service told me, you would find water come out faster as the treated water clears the pipe when it flows thru it.I only give this 4 stars as I haven't test it long enough and I have that strange sticky sensation in my hand when I bath. But so far, it seem to be doing what it said it will do, and clearing the washing machine pipe is a biggie for me as it would take away the problem permanently if indeed this is the cause. If this indeed works as advertised. This is a great thing since it only cost electric now instead of the salty mess which does not take care of the whole house anyway.