The doorstop denied in practice, if the distance between door edge and the floor is not large enough (preferably more than 1 cm). In a contemporary house trying to avoid drafts to keep this distance as small as possible. The doorstop slips at home just before the door opening on the tile floor, without really grab. That's why even the alarm triggered as good as ever. This was true for almost all doors, even for the front door. The negative rating applies only to the product itself. The delivery and the withdrawal by the provider was impeccable.
