The function of the door stopper is fortunately exactly as desired. The front edge is flat enough to fit in the vast majority of crack in the door. If this doorstop should be too thick, it is more like a narrow crack in the door to. It would then be difficult at all to find a suitable door stop alarm.
On our laminate the unit does not slip away, as some reviewers report. With a stopper, we are able even to secure a double door (without crossbar) when the stopper is positioned exactly in the middle between the doors.
Be careful with the ears, the part is really pathetic loud and shrill. Try not to close to the ears.
The price for 2 pieces is fair and shipping was lightning fast.
I can recommend the stoppers very, 4 stars (1 deduction for bad environmental record in power and packaging).