Anyone here have nitrous?

Alright i'm stuck between getting a NOS kit or a Zex kit...I keep on hearing how good NOS is, but i also hear that Zex is more user friendly and easier to install...What do you guys think? Anyone have any of these systems?

I had the zex kit on my old civic, it is a very good setup. I would recommend Zex over NOS, but then again, I have never used the NOS brand. :)