To answer how backroom works at these type of stores...there is a small stockroom in the back. I'm not sure of the name for this, but the aisles are basically long metal bookshelves on tracks, and with the turn of a wheel the various aisles open/close to allow access. I was only there for one day to help set up, but there is another Express opening near me next year. I'm hoping to be recruited to help out with that one as well. I've heard there will be an STL and about 8 TLs, no ETLs. We'll see.