Used BOS for BOS-FRA earlier this month returning yesterday. Terminal E's upgrades are nearing completion now Massport is putting new wall coverings up and new flooring at the Northwest section of the terminal. Boarding was not as chaotic as before and escalators were installed at this gate as well (departure lounge on level 3 boarding and CBP on level 2). On arrival the CBP immigration hall was empty. I have never seen it so empty before. I was literally through immigration 45 seconds after I entered the hall. The bag claim/customs hall is almost fully completed; there is a temporary wall beyond carousel 6 but other than that Terminal E is nearly done and has come a long way.