This piece of equipment is key for any chef attempting to extract flavors in the purist forms. It is an absolute requirement if you believe (as I do) that the most important elements ion the kitchen are; taste/flavor and purity/color. The rotary evaporator is one of the essential tools to achieve absolute perfect concentration. In any kitchen the focus should be, purity based on concentration, flavor based on extraction and color based on natural elements. The rotary evaporator is not difficult to operate but slightly costly.