Very good

Great app!
Pleasing soundscapes. Interface includes Favorites feature — you can select those items you like better and get their list.

Ive searched for an app like Aire Freshener (windows program), but for Mac.
This app is good enough, but it lacks sounds combining.
Give it 5 stars, because its one of the best by now.

snusmumric about Sleep Pillow, v1.0