Where do I start? The product sells itself. Period. Had Reference 4 Studio and now Sound ID, with mic and headphones. Moved from one state to another with teardowns and rebuilds. Whether you use to treat or not treat the room is your choice. Professionals will have fabulous results if they do. Flawless purchase process, download and install. Did I mention the quick responses with the company if you have to troubleshoot anything? Excellent! The product is a well-spent small investment and you will hear the difference. Hey, no one can help you make up your mind to purchase or not, only you and your studio are your answer to the question. All I can tell you is it made a great noticeable difference because if you treat a room and it's not exactly set up right, this product will make your room monitors work for you. Headphones monitoring or other monitors are on your screen to switch on the fly. Pleasing to the eye graphic, so many new features with the Sound ID are well done. When I start my computer/interfaces, all systems are working perfectly and not trying to stumble around getting the outputs going. I put this on my DAW as the last plugin of the chain, and switch it off during bouncing. If you are a serious mixer in the business, you always have to adjust your room monitors for true quality or you are fooling yourself or just excepting the low standards. Perhaps, maybe you have that perfect mix room by chance. Hard to believe without some tweaking...