This plugin helped me to deliver a multilingual setup with different domains (one domain per language).
It does a lot of stuff in the background which is needed to make the system work although the language slug is not shown anymore.
Configuration in the dashboard looks very professional and is well structured and nicely usable.
The product author has reacted very fast to a support thread that I opened concerning some smaller problems.
Regarding the many tasks the plugin has to cover to do its job the price seems fair.