Very quiet compared to other foot spas (sounds like...a cordless vacuum cleaner that's very low on battery). It keeps warm water warm and makes cold water warmer. Water level suggested for use (there are lines inside the foot spa indicating minimum and maximum water levels recommended) is adequate for covering the entire feet, just right up to the ankles. The foot spa can accommodate feet as large as size w11. However, the bubble feature can sometimes make some of the water splash out. If you're looking for a foot massager, try actual foot massagers, because the features in this foot spa are limited in its capacity for massaging. If you're looking for a "soothing and silent" foot soak, try this one.