KM's are great! They don't allow for an "auto-seal" like Mya or some of the others but certainly allows for great flow. They are really durable and typically give off great smoke! I ordered a MYA today but frequently use a KM and plan on continuing. Another neat thing is that the hose port doesn't come off. Its just another more durable aspect of the KM. You will get some weld points though. They aren't machine made so once in awhile you will see a bit of a blemish. Still I agree with wacawaca...
KM's in my opinion are the Rolls-Royce of hookahs.