The choice was actually not based on the Plus suffix per se. Staying 6+ h, proximity to airport, availability of a hotel shuttle and reviews were prime chriteria. Beeing part of a well known chain of hotels pushed my interest a tad, but IIRC, my previous BW stay was >15years ago.
The problems with reading reviews are that you don't know the reference scale of the reviewer; i.e. with hostel standard previous experience this hotel room was well worth a 4 or even a 5.
Lesson learned.