I think AiME is a great product. Not only it inherited all the great art from The One Ring (John Howe, along with Jon Hodgson and Tomasz Jedruszek), but also created great new rules and system to bring the feeling of Middle-Earth to the 5th edition of D&D. Most of the presented abilities, feats and even skills have additional narrative focus. In my oppinion, it brings the narrative verve of 13th age to the 5th edition, with a dark tone. This dark tone comes from the corruption aspect of Tolkien universe, where characters fades into a bitter end.
I'll recommend this to anyone that either wants to run a Middle-Earth campaign but rather keep using the familiar rules or disliked the rules from The One Ring; or you want to add the additional classes and rules for Journeys, Corruption, Audiences and Fellowship Phase, which are all very interesting. I also wrote a short review in Portuguese on my blog.