Nitrous Filter Suggestions

Who here uses a nitrous filter? I need to know which filter I should go with. It's something not many people really discuss here. I prefer to stick with NX brand, but i think they make a couple different ones. It just goes inline right? Does it matter where inline?

The only NX component I have in my system is their #15610 (-6AN) nitrous filter. Its attached directly to the bottle nut.