I've bought two of these bastards
the double perculator with the diffusor on top
and the single perc with diffusor
I have to admit, best bong I ever smoked out of, I liked to call my double super bong lol
But be careful
This is just a fair warning.
I bought my first one and my dog ran into it breaking the glass on glass piece my stem was supposed to go in.
With my second it broke in the exact same place when hit by a shoe.
I went to the smoke shop I bought them at and spoke with the owner he said that a lot of people have had this same problem
This smoke shop has even hired another company to fix breaks because the PHX's are so expensive but seem to all be breaking in this same place.
So just fair warning
Watch your piece
Tears will well into your eyes when something you just shelled out 500 bucks for breaks in such a retarded place.