Product review (4 stars): It does seem to filter out some dissolved solids - the meter I have measures it at 148 ppm which is better than some
It seems to filter very well but not as quickly as claimed . It does seem to filter out some dissolved solids - the meter I have measures it at 148 ppm which is better than some but also worse than some - the taste of the water is improved a little. You also have to hold your thumb on the cover or it will fall off on top of whatever you are trying to pour into.