I've had it in my game since it was released, and never had any problem with it. As far as I know, it's 'only' a workaround (but a pretty cool one!) at having to manually edit the text files that contain the data for modular stairs, fireplaces, etc, so if you are comfortable with those changes, that is, the actual items, it should be safe (and convenient) to use it. Oh, and I've been using some of the stairs that make use of it, and they all work fine.