Vestibule deployed on the BH6 and it's pretty sweet. I put a tarp down so the dogs have a place to chill that's shaded and not directly in the dirt.
The vestibule is a cool option but I haven't really found a use for it yet that made me think I couldn't live without it. It's a nice place to store camp chairs and tables and stuff when we leave camp for the day or at night to get out of the morning dew.
Picture shown with one side unzipped completely but both sides do unzip.