Noise...
I had a 5th floor room near the elevator. Every morning (Fri, Sat, Sun) around 8am, I heard this thumping pop-music bass, coming from somewhere unknown. Every night I heard laughing and noise from the lounge, which was on the first floor below me: the sound carried up the courtyard outside my window. The hotel is pet-friendly, which is cool in theory, except that Sunday morning's bass thumping, and absence of this dog's owner, meant it barked and howled for over an hour. Then there was the unfixed squeak of the elevator, and thumping and noise from the older plumbing. It all added up to so many annoyances and un-restful mornings and evenings that come check-out, I couldn't wait to leave. I think the place suffers from being converted to a hotel, so (um, needed) sound-proofing in the walls never happened: that's just a guess. In any case, I'll never go back to this place, and will think twice about Kimpton hotels in the future.