Product review (4 stars): You can tell the difference, but you will get used to it.
I really wanted these to work out, since they are much cheaper than the Samsung brand, but even when they are brand new, I don't like the taste of the water they produce. The water that goes through this filter goes almost exclusively into my ice maker; I hardly ever use filtered fridge water. If I'm drinking soda with crushed ice, the taste is less noticeable. But for ice water using Clear2O filtered water, no way. You can tell the difference a mile off. I'm not speaking to its contaminant-filtering abilities, which may be fine, but the taste is icky. So from now on I'm going to bite the bullet & pay for the brand-name filters.

Update 12/27/12 I have to say, I suppose I have gotten used to the taste. So sue me. At first it was kind of shocking, but because I am too cheap to just throw them away I kept using them (i.e., used the icemaker ice) when I was too lazy to get the ice out of trays (I have to use both, because I am an ice-o-holic who can bottom out an icemaker any time of year). The taste doesn't bother me as much, even though I'm always sort of mentally braced for it. I have 2 filters to go, so probably by the time I get through those two I won't notice any difference at all. I don't know why I sound so grudging about this. Maybe I'm not the water snob I think I am, or something.