This was a wonderful tour led by a costumed guide dressed as William Maxwell (and fully in character as such), one of the main architects of the hotel. The guide had a nice sense of humor that kept things spicy.
The tour is heavy on the details, architecture and aesthetics of the hotel. There is some history mixed in there, too. The guide walked us through the different phases of construction, and that was very interesting. We started on the Terasse, and then we toured the lobby and its various segments, the restaurant and bar area and a guest room. The tour took approximately 1 hour (perhaps a few minutes longer).
I was traveling with my husband (a civil engineer who loved hearing about the construction and design), my thirteen y.o. son (analytical kid who has a strong interest in facts and history) and my nine y.o. daughter (who is none of the above). My husband, son and I thoroughly enjoyed the tour. It was just the right length and gave us all the information we needed to understand the hotel and how it came to be there. Our daughter was less enthusiastic and probably “checked out” after about thirty minutes. That was okay, though, because it was still an important experience that she’ll remember and appreciate as she gets older. There was enough movement around the hotel to keep her distantly engaged, and it minimized her whining. She was the youngest participant in the tour. It was mostly adults, and we were urged to be respectful and quiet in the hotel, so if you have young children, for your own peace of mind, you might want to hold off on this until they’re a bit older.
There is also the option of reserving an English speaking tour guide or a French speaking tour guide. And as others have suggested, book your tour online in advance. We went in April and were able to book the evening before. I imagine yours will fill up faster during the summer months.