I used one back in the day for a little while. It was just an enormous cone with a nice brakcet setup for the end of the MAF. You can certainly get a standard cone to fit cheaper if that's the way you want to go.
Personally, my favorite setup so far has been the Moroso setup -- I liked the plain looks and relatively cheap price -- and if any of the different induction kits do anything, this one would work just as well as the others.