The Guardala King is CNC designed and made and the build quality is superior to either the Runyon or Brilhart. It played faily easily for me- the facing curve on the one I trialed was well done, however it had a bit too thin of a tone for me. It played more evenly for me but the lower register on the sax didn't quite have the fullness I like. I preferred the sound I got from the Ponzol mouthpieces, either a used brass M2 or a Stainless M2. I'm not sure if you are after a fuller, darker tone in the bottom range of the horn along with the brighter upper register or more of a thinner, brighter sound all the way through. A Berg 0 or any Berg for that matter is more of a crap shoot regarding quality control. The Guardala would be a more secure bet. Also, if you aren't against a high baffle/ non metal piece, I would suggest you try either a Vandoren Jumbo-Java, which internally is quite similar to the more expensive Guardala, but to me has a fuller tone, or even the very inexpensive Rico Royal Metallite which is also quite similar in tone and baffle/chamber construction. Both the Vandoren and the Metallite are a real bargain compared to the Guardala. The Metallite, despite its price, will give you pretty much what the Guardala will give you, tonewise. One last point: the Guardalawill feel smaller and thinner in your mouth compared to the size of the Brilhart. It is more in line with a thin bodied Berg.