Yeah, I've played it quite a bit, it's fun to move your guys around, train them all up to get the most optimal setup and the quickest resource generation.
However I have got to the point where instead of the easy bandit invasions that you can repel by the first room, or the radroaches, you get Deathclaws that you can't kill because they move too fast and they are too tough, and mole rats that come through the walls. It's as if I've hit a wall of difficulty with the random events.