We received a IW countertop water system from someone who no longer wanted it. My wife tried it out after running 3 tanks of water through the existing filters, and said the water was upsetting her stomach, so we ordered new filters. I find it odd that you would ask me to write a review before the filters even arrived. That alone tells you your shipping standards leave something to be desired; anytime you engage the USPS to deliver something, you will be disappointed. I hope the new filters do the trick, otherwise I just wasted 75 bucks. BTW, I won’t be able to answer some of the questions in your survey, because I haven’t received the filters yet.