INSTANT and PALPABLE improvement in our drinking water's taste and clarity. Absolutely would recommend this product, especially if you live somewhere like Los Angeles where the tap water, while safe, is kinda gross and extremely dependent on the pipes in the building you're in. Only downsides are that, while it's not enormous, it's big enough to be a bit of an impediment in our small apartment sink, and the installation instructions were definitely lacking in clarity (i.e. fixture parts that are labeled in the instruction booklet aren't labeled on themselves or anywhere on the packaging, so it's tricky to figure out where to start). All in all, well worth the price.