Product review (5 stars): Really makes a difference!
This filter works great! Previously, when inviting friends over, we had to wash glasses and wipe them dry manually to remove any white spots before putting on the table - washing machine made them clean, but not clear. Now we don't need to worry about it.

I installed the filter in the middle of March, 2010. In the beginning of May, the white residue started coming back and I ordered replacement filters. On 05/13/2010 I replaced the filter and as of 07/17/2010 our dishes are still clean. If I have to replace filter every 2-3 months, it's OK with me.

During installation I did not have any specific issues. Given that I have to replace filter once in a while, I decided to replace the copper tube going to dishwasher with a flexible supply pipe. Other than that, I did not have to do anything special.

So, overall I am impressed with the filter and I highly recommend it.

P.S. I don't leave many reviews (lazy?), in fact this is my second review on Amazon, but this filter is so great so I believe it deserves to be told to other people about.