I ended up buying two of these because I have a step son. The first unit was great. The cuts were square, and there was some scoring on the face to keep it from sliding. The second unit is useful for building a barn, if you are not picky. The bottom is not flat, and neither is the front. The scoring on the face is insufficient, and even with a jig, it wobbles because of its not being square. You may get one that is fine. I am going to buy a Porter-Cable or Makita.