The pump arrived in good order and as described.
Pre-sales told me I could run it on 24V but when I did, the scream was uncomfortable and it seemed to pump a lot of air so I've been running it on 12V. It's still noisier than my last pump, and slower, but it does the job. It's pumping at about 7GPM, not as high as advertised but still sufficient for my task.
At this stage (after 4 uses), I'd buy it again.