Amazon Link is clearly the most advanced plugin for Amazon Affiliates. It is full of options and covers several different needs. I'm also having some issue and the plugin author is putting so much effort in helping and giving some clues and ideas (thanks, Paul!).
As you can see in the Support Forum, there's a lot of people being grateful for the quick and accurate responses to any problem or question.
I'm pretty sure that there will be more improvements that will give us more functionalities.
A really useful tool for real life problems.