Iv`e been using them for years.
Started out with the Taylor kit alonggggggggggggggggg time ago,but changed to the faster strips and never had a water problem.

Sometimes I get my water tested at the store with that supper dupper analizer they have and my readings usually are in the same range.

I hear they have a smaller anilizer for home or service use(about $200 I think) anyone have it and is it worth it.

mike