Well, it kept me entertained, but it sure took them a LONG time to decipher that mysterious note (I'd figured it out ages before they even though of it), and the forced romantic tension was really forced and tedious. 

Also, and this is specific to the audiobook version, the narrator had a WEIRD accent. Like, part of it was probably  a realistic representation of how an American woman who'd lived in Britain for a decade would probably sound, but then she does things like say 'valay' for valet, when SURELY someone who's lived in British high society, where all the gentlemen have valets, would know that it's not pronounced that way.