It's a beautiful property with vaulted ceilings and grand fixtures and furnishings. You can feel the history & luxury of that time. The rooms are ludicrously large, which sometimes made us laugh at how we had to yell to speak across the room, but they were also beautiful and a treat to inhabit. We loved the french doors & view of the park & the Amazon. I'd say the floors could be a bit cleaner, but in general it was clean (I am picky on this point), and I imagine it's a huge job keeping it so!
I had mixed experiences with the staff helpfulness. Out of two trips we made, one time the desk staff arranged things with a taxi driver for us and the 2nd time she simply suggested we get a tuktuk and didn't seem inclined to help. We managed just fine, and it was an adventure we enjoyed, but when I booked I'd had the impression that the hotel was able to set things up for us so we could avoid being ripped off or sent to the wrong location (as some tourists are). On the plus side, there was a book of information in our rooms which was generally correct.
Overall, I'd likely return if traveling again to Iquitos.