Positive things:
The cover is already fluffy, also the foot warmer is so soft that I can move well with him. That said, I can lay or stretch out with the warmer my feet on the sofa.
The heat is quickly available because it warms up quickly. In Stage 3, I have a warm feeling on the feet. After 30 minutes, they are so warm that I realize how cool it again, if I leave the bag. Nevertheless, my feet then remain pleasantly warm - in body temperature, so that the bag did its job.
Negatives:
It is not uniformly hot, because it is not warmed throughout. Underfoot is only slightly foam which is not heated. I do not mind, as it still is nice and soft and warm. A better heat effect there but when the bag would be hot everywhere.
In addition, it might be better, with a successor model, the inner workings festzukletten because it can no longer slip.
Conclusion:
I am very happy because I get warm feet with already low heat. However, if something wants warms everywhere, has to look for another foot warmers.