Bought the door closer to keep the door to the attic apartment of my children closed to avoid having to heat the entire staircase to the perfect temperature. The assembly actually was quite simply and without tools. After I was not sure at first which of the three "rebound" is right (I feared a door slamming ...), was initially selected the middle step. Although there is a not too heavy wooden door, they tended to be more open to. Of course that was not what I wanted to achieve. Even in the strongest level now selected is the fear that the door could slam shut, inappropriate. She is very gentle drawn, but remains open without falling into the lock. So my purpose is fulfilled to 70%, in fact, I would have more force of the spring expected. 3 stars for a good approach with deduction for lack of power. Therefore, conditional purchase recommendation from me ...