Quality's nowhere near a KM on the darwish. Friend of mine bought one about three months back... The inside of the stem has already corroded through and sprung a leak out the middle of the stem. Big ol' hole in the side of it.
Aside from that, they're narrow, plated common chamber, and the pieces don't fit together right (Modular stem).
To be honest, I've had $20 chinese hookahs that have outperformed and outlasted my buddy's darwish. They don't come close to comparing to a KM for quality.