What is the final ppm or EC value of your reverse osmosis water? I ran tests on my current water filtration and only noticeable difference was a PH reading of 0.5 less than tap water. I cannot comment on any pesticides or chemicals that are in the tap water. (I would recommend filtration irrespective of tap quality to remove bacteria and other impurities I don’t have the equipment to test for) I was thinking of getting reverse osmosis but my water quality is quite good 50- 100 ppm. RO wouldn’t help me much. Only think I can think of is perhaps the RO changes the PH of the water making it slightly less alkaline towards PH neutral. Most people agree that a slightly acidic PH in water tastes better than tap water. To put things into perspective, tap water is around 8.5PH where spring or bottled water is around 5-6PH.