For delivery and packaging no problem. Two things bother me: 1) the temperature is relatively low, say after 45 minutes at maximum power it is about the maximum temperature. That means about 37 °. Advantages: Can not get burned and probably some security not to set fire to bedding. Cons: when we get home late and you want to sleep quickly, the bed does not have time to heat in 10/15 minutes. The accumulated heat dissipates quickly because in essence, if the bed is cozy because still hot, it is warmer than really hot. 2) The manual is well done, we feel the German product, the quality of the realization inspires confidence, but despite the coverage of fastening means (not washable), it is written anywhere on the mode jobs that can truly lie on, ie the insert between the mattress and fitted sheet. This raises two questions for me: What about longevity felt and what about security if one is lying on the resistance? And if one is to do two somersaults? Is it really pleasant to lie on the resistance and wake zebra? The manual says nothing about all that and suddenly I place between quilt and sheet and the entire retires to bed. I think it is a good product for a classic bedding (sheets and blanket), to be inserted between cover and top sheet; for a quilt that seems less obvious to me. For the price, there is nothing to moan, but I still feel not having really high-end purchase. But I knew before buying as prices may be multiplied by three.