The product is well made. Maybe a little too expensive but effective for those who, for various reasons, cannot set up a small vocal recording room. It isolates well from the outside but not totally, it certainly improves the quality of the final recording a lot, but do not expect to be like in a proper recording booth. The air flow inside is limited due to the nature of the product's shape, but it is still comfortable, making pauses from time to time. The vocal recording, even if you can hear a little "box" effect, is really good and brings your singing closer to professional levels. Initially inside the box there is a little smell of new material that I hope will decrease over time. With a Neuman TLM 67, its stand and pop filter I had some limitations in passing the cable through the slot and keeping the microphone straight. This part should be better engineered for more compatibility but with their “Mic Holder” you can benefit from an extra holder for swapping between microphones. I really have to say that my recorded voice is now much more present, detailed and easy to insert into a final mix. A vero good product!