The basic shortcodes to add links work. I like that a small Amazon logo can be added to the end of the link to make it obvious it's an Amazon link.
However, one of the major advantages of this plugin over others is that it offers geotargeting without use of the Amazon API. But this just doesn't work.
The developer seems disinterested in supporting this. They only responded on the third channel I tried to contact them on and won't promise a fix. I understand - it's free - but it doesn't live up to its promises, as far as I can tell.
Happy to change my review if I'm proven wrong. In the meantime, I've moved to BestAzon which has geotargeting that works.