Product review (4 stars): Dual-action filter
It filters your water, and is equally, if not more, efficient at filtering money from your wallet.  Seriously, I know all about the razor/razor-blade revenue model, but they got nothing on the refrigerator/water filter racket.  And last I looked, razors didn't cost $2500.

So yeah, it filters your water good, and doesn't make a lot of noise or come in the wrong color or is not compatible with the latest HDMI 1.4 standards.  It's a water filter.  And it's more than $30 for some charcoal and plastic.  I just have to note how unwelcome this fact is.