Love the smooth sound, volume control, schedule function, and Bluetooth. Because it's making a smooth sound instead of playing a recording, you never have to worry about noticing a looping effect. Volume control is great, because while I usually use it at a mild volume for sleeping, I sometimes blast it to help me drown out noise during the day if I need to concentrate on work. The schedule function is one of the reasons I bought it since it automatically goes on and off at the times you program it. Going on at a set time is great to encourage healthy getting to sleep habits right at the start of when I should be getting ready to sleep. And, turning off at a certain its programed is great for encouraging consistent waking times for better sleep habits. The most surprisingly useful function is the Bluetooth connectivity. I never thought I would use the Bluetooth, but I use it all the time. Imagine being in bed when you're too tired to get up and turn on the noise if you want an early sleep night or too tired to get up and turn it off because you need to hear someone outside your bed asking for you. With the Bluetooth connectivity, I can and do adjust matters without even getting up. I am happy I got this product.