I have a pair of water filter housings in series, first one with a pleated poly 50-micron filter, second with a ceramic 1-micron filter that's damned closed to sterile (80%+ filtration at 0.5 micron). Both are cleanable. Once the rest of my gear arrives I'll be doing a review, comparing filtration to fining.
From everything I've read here and elsewhere, filtration is unpopular due to 3 reasons. 1 - "it tastes worse", 2 - "it's not real beer", and 3 - "it's expensive". At the same time, there seems to be a consensus among those who have tried it that filtering drastically reduces the time their beer needs to be ready to drink.
I'm impatient; I'd prefer a minimal grain to glass time, especially now that I know how fast the commercial micro and macro breweries do it. A good starter, oxygenated wort, filtration, and a beerbug to monitor the fermentation should cut me from 4 weeks to about 2, max.