I am very happy with these filters, they work great. I set them up as subscribe and keep so I get one automatically in the mail every 3 months so I never have to think about when to replace it. In the summer, when I start the sprinklers and fill the pool, I switch it to every other month. Our water here in the southwest suburbs of Chicago is very hard and the filter seems to be picking up some of it. We see fewer mineral deposits in the dishwasher as an advantage. I also noticed that the filters in our reverse osmosis water system were a lot cleaner last time, so I might experiment with running them a little longer. UPDATE FOR 1 YEAR. I've been using them for almost a year. And I have to say that I'm still very happy with their performance. The subscription and retention price is up a dollar and changing, but it doesn't bother me enough to find another filter. I have had NO instances of my block falling apart, cracking or disintegrating so these other people must have horrible water or leave them on the WAY for too long! I drained my water heater about two months ago and it wasn't coming out as much sediment as it has in years past, so they're definitely helping. (When I change the filter it's completely covered in rust buildup, and I mean COMPLETELY covered. Amazing what this thing catches!) I'm keeping 5 stars, they're pretty cheap and work well so overall I find a nice good value money.
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