There's a fitment for the 1.8T, not the V6... even if they say it fits. OEM's are great filters. I run the K&N on my fiancés Jetta 1.8T, the 1" end-nut makes it very easy to get it on and off in a transverse 1.8T.
Please note when people say they are happy with it...they also would get the same effect from the cheapest fram filter. How can you use 3 of them and be happy, even over 5 years how can you tell? Only after 100,000 miles or so would you be able to tell anything, but probably not because there are so many other factors. Any filter may be crap, but unless you do scientific tests there is no way to prove it.
Just use the Mann/Mahle OEM brands (dealer filters) they are supposedly good. After all they were designed for the car. Or that big kahuna one is good too.