Correct it is for 1 night only and I'm only now finalising the night. Just noticed, using your bidding helper tool, a 104/night 4.5* in Mag Mile area, but wondering if this might be the Westin (Restaurant, Fitness, Smoke Free, Hi-Speed Internet, Business, Golf, Spa, Childrens Activities, Blind Accessible, Deaf Accessible, Travel Accessible, Room Accessible, Bathroom Accessible, Wheelchair Accessible, Roll-in Shower, Pet Friendly).
Because if it is, when I searched the reviews on TripAdvisor, there is an option to book this hotel for a straight 124/night, which would end up cheaper than booking through HW and PL.
I suppose if I'm looking for best option, then booking directly for that price would be decent if the Westin is a respectable hotel.
I'd hate to choose the HW 104/night and then end up paying more than I could actually get it elsewhere.