Best to worst:
Aman Sveti Stefan - a location that is entirely unique. So much space and varied dining options
Amanoi - best hard product, amazing views, unique location
Amanpuri - the best beach and food in Phuket by far (just don't take anything below partial sea view pavilion)
Amankila - views, the best pools and now much better food - oil tankers are getting really bad though
Amanjiwo - amazing location and views. Pavilions now feel dated and dining could be better
Amanbagh - such an incredible experience of rural India. Average food and awful wine list
Amandari - very nice, but Ubud now not the best area
Amanjena - liked most things apart from the lack of views, which is a shame
Amanusa - not thrilled with the location, but the beach club was nice
Amangalla - interesting to see the historic property restored, but feels expensive for what is offered - I could spend no more than a couple of days there
Amanwella - great beach but nothing else good to say