Good foot warmers

The foot warmer is really great.
As I compared several foot warmers and most reviews were not good, I have gained this device.
After almost a month, I can say the following:
The food is very pleasant optimally on the feet and the heat.
The switchable massage function does what it should and in two stages.

Only suspend I have, since the product of GB / UK is that it is supplied with a plug-type G. Thus, it is in German households require an adapter of GB / UK (socket-type G) to use on Schuko plug for Germany (connector type F). Who has not (I did not) should be to order a equal to or look at the regional electric market afterwards, so that you can use as intended the product.
Since this was not in the description, I prefer from a star.

To remove and wash, I can not say anything yet.