I have to agree with some reviewers that the underblanket is rigid and structured. Opposite my pocket spring mattress, on this Wärmeunterbett is, it feels relatively firm. When do you feel already that it is on a rigid Wärmeunterbett. The heating wires are therefore not feel because they are incorporated into this solid base. Who has a hard mattress, which will probably be satisfied. Otherwise, the full effect of heat is at zugedecktem bed only after 30 - 45 minute achieved (which is also described in an enclosed leaflet). I can not understand that some claim that the underblanket heats up quickly. The heat, however, is sufficient. The flat connector does not bother me. There are other manufacturers, where the connector is mounted on the outside of the lower bed edge and is perceived as disturbing, if one fitted sheet is pulled over it.
