I bought this the other week, and have subsequently rediscovered how much of an absolute joy Hammer is for level building. There is no greater feeling than being able to lay down level blockouts in freaking MINUTES. Hammer is just so much more of an elegant solution for doing so than UE4’s built-in tools. I haven’t even freaking touched HammUEr yet, but 10/10 for making me go back and use Hammer.