Bought this product in replacement to my old reflection filter - which is known to be one of the best solutions - hoping to reduce the captured room sound and get some isolation.
The booth solves the reflection issue beautifully. With a reflection panel, you still hear the reflections with your ears, hoping that reflection is not captured by the mic. Within this booth, its all dry, which is better in my opinion since its better to compensate with some reverb than hearing a badly treated room sound. On the other hand, the sound inside is boxy. It can be filtered out with some eq, however I prefer to track the sound right at the first place. Can live with that though.
I am a very loud singer. I recorded some room sound with and without the booth. The result was at around -15 dB. When I put someone else in the booth and listened at the next room however, I heard some substantial reduction in volume. I believe if you're a loud vocalist your neighbours will still be hearing you singing, but it wont be as loud as before.
Another point to mention is, it becomes really hot inside, so if your room is already hot, that may affect your comfort while singing.
Final thoughts; this is the best portable reflection solution i came up with so far. On the isolation side, it wont create miracles but unless you have the opportunity to properly treat and isolate a vocal recording space, this product is your best bet.