" The 4242E sound isolation booth I purchased from WhisperRoom has provided me with the answer to everything I was looking for in terms of sound isolation. Using it for vocal practice and recording, the booth allows me to work ANY time I want without disturbing bordering apartment units. While the price (including the extra enclosure) may seem high, the ability to practice and perform music at any hour in the privacy of my home has made this purchase a fine investment. I recommend the booths wholeheartedly. "