I've smoked from a lot of pieces. This has cut down the amount I go through substantially. A little goes a long ways with this guy. Great piece. Make the investment.
All I can say is this thing rips! The removable one hitter is something I didn't even realize it had when I purchased it but is a pretty cool feature. Honestly, don't even put too much thought into it, this is the last bong I'll ever buy. The thing is a beast.