Well, I actually bought the game, and I have not regretted it. Mind you, it is definitely not for everybody. You have to take it for what it is, and don't expect it to be something it is not. I recommend watching a few YouTube videos of it to see if it is something you'd enjoy playing around with. There isn't all that much content in the game (at least not yet), but it seems to be connected to the workshop, so users might make a lot more content for it soon.
All in all, I find it quite fun, and can imagine firing it up occasionally for a long time to come, whenever I just feel like doing silly things.