QuietRock is a soundproofing panel of choice of DrywallTaping.ca. We have installed it in a number of households and have been happy with the results. To sound proof your room you may either use layers of drywall or opt for a sound-damping product like QuietRock ES or QuietRock 535. QuietRock offers outstanding acoustic performance exceeding STC code requirements with only one layer of the product. Which in turn saves your valuable space you otherwise would be scarifying by installing layers of drywall. By the way, to achieve the same result with regular drywall you would need 8 layers of it.