Having used both extensively, AssertJ's API is more obvious and generally useful out of the box. It's replaced all the places where I'd previously used custom H

Having used both extensively, AssertJ's API is more obvious and generally useful out of the box. It's replaced all the places where I'd previously used custom Hamcrest matchers with generally smaller amounts of code that spit out better errors when tests fail. It's not a either or though, sometimes it's worth looking at whether hamcrest is the right approach.