Everything about Audyssey Calibration that you need to know

Hi guys,

Has anyone purchased and tried the Audyssey MultEQ-X for their Denon/Marantz AVR? If so, would appreciate your sharing, findings and thoughts on the SQ improvement of this latest MultEQ-X room calibration S/W over the built-in MultEQ XT/XT32 that comes readily installed on the older model of AVRs. Deliberating if it’s worth taking the plunge (USD199) for my AVC-8500H. Any thoughts and inputs by fellow bros is greatly appreciated. Thanks.