There is direct line of site from the vocal booth to the control room. There is also direct line of site to the main tracking room. This means that if you are recording with a band or an accompanist you can see them and yet not have the sound bleeding into your microphone.
Unlike most vocal "booths" we stayed away from that idea. We wanted to make sure our clients are comfortable. There are two doors to the vocal room. One goes into the studio and towards the control room, the other goes outside which is great for when you need a break.
Finally, this is one of a few different areas where we like to record podcast. The vocal room, the main tracking room and even our lounge are very suitable for recorded podcasts.