I did one a few months ago. It was pretty labor intensive in that they want you to evaluate a lot of different areas and employees. You must get names and/or descriptions of each person listed on the report, as well as answers questions AND provide a narrative for each section.
I've never done a hotel shop before, so I don't know if this was a typical report.
My recommendation is to take your laptop with you and enter the report information as you do it. Don't wait until you get home, or you'll be writing forever. The good thing was I had 24 hours after checkout to submit the report.
I had to leave by 10 am because of a previous commitment, and checkout was noon, so I think if I had stayed longer I'd have had some time to actually enjoy the hotel.