I did an installation in LA where the contractor on the project used Acoustiblok to isolate a home theater that was built on the 2nd floor. I had never heard of it and it looked like rubber roofing material to me. I could not believe how well the product worked. With the system off you experienced complete silence in the room because the rest of the home was kept out. You couldn’t tell when the system was on if you were not in the theater. During a recent follow up visit for upgrades the client told me how they spend a good deal of time in the theater with the system off because its so relaxing and quiet.
This video says it all.