After a week in use I am completely satisfied and can not fault it. Even the functions "night light" and "lullaby", which I thought initially on pointless gimmicks, are now regularly in use.
Because of the bad reviews I have some hesitation before I purchased it. If you understand these instructions read one realizes that the bad reviews are partly due to operator error but carefully. It's a shame when a really good device gets bad reviews and potential buyers are confused by it.