Living in Sydney our water is terrible quality, but we are in an apartment building and can't get a filtration system, bought this tap - the T-3 is awesome.
First had one when living in Japan and just moved into Zetlands and saw the T1 here, but it's worth going with the T3.
What we like is there is a switch to go between filtered and tap water.
Also environmental friendly and removes chlorine and other nasties. We are super vigilant about our water quality. Very easy to install too.
Better and cheaper to have a standard size 10 inch water filter. I do not think such a tiny micro one could be efficient.