I just ordered the Hookah Diffuser from hookah-shisha.com.
What a difference! In noise, taste, and smoke.
First it really cuts down on the noise, very quiet. I've noticed you can really taste the flavor better too, and it improves the smoke intake. I guess it also works as a filter too.
This product comes two to a package, a large, and small. They can be used separately or together as a double diffuser.
Also, I sometimes like to use a milk base, and of course it bubbles up too fast, this diffuser is an excellent way to prevent milk from bubbling.
Shisa flavors, and brands are subjective to individuals. But proper setup and hookah care is not.