- Heat output is too weak (even at the highest level is very even heating)
- It does not create reasonable itself, that it is not close to the body to. The chest rubber bands are available, which should keep the pillow, but these are, at least for the gifted person (approximately 1.60 m height) is not nearly enough.
Even the neck area not located on, you had to press it by hand, which can not be the intention of the manufacturer.