Standard delivery without notice but already identified in customer comments for the article. Video available on youtube for bending, very simple (reference video to type in the search engine Youtube: CW6oAD8ZcF4). Video watching beforehand to understand how the bottom folds / unfolds and avoid a sudden and uncontrolled unfolding at the first opening.
Note a problem to arrange re-delivery with the carrier (Exapaq) but quick action after call Customer Service and finally received packages by the deadline.