Good watch, could watch again, and can recommend.
This is probably more interesting than good when it comes down to it.
I'm not a big fan of Matthew McConaughey or Jason Clarke, but they sure nail all the crazy in their roles.
Djimon Hounsou probably has the only character that isn't crazy to some degree. The "Moby Dick" reference is strong, but the story structure allows for theming to evolve as the story continues.
Each arc is interesting as if it is a new story using the same characters.
While the journey definitely carries some intensity with it, the end is a bit vague and may leave you questioning not only what happened in the movie, but questioning reality.