Conversation so far:
What was Sufjan Stevens's BQE?
The BQE is a mixed-medium artistic exploration of the Brooklyn-Queens Expressway by Sufjan Stevens.
Was the BQE a show or a type of album?
The BQE originally manifested in the form of a live show, performed on November 1–3, 2007.
Was the BQE successful?
The BQE performance sold out the 2,109 seat BAM Opera House without any advertising

Question: What did critics say about the BQE?
Self-contained rewrite: What did critics say about Sufjan Stevens's BQE?