This machine is just the right size to place on the night stand.  The buttons are easy to push and responsive (just one click to change the sounds pattern), you can adjust the sound up or down to just the right amount.  When you first turn it on the sound is a bit loud so you will need to adjust it down a bit for a soft, soothing sound.  Very simple and easy to use and doesn't require any assembly at all.  You can plug it in or insert batteries to use it possibly when traveling or camping.  You can set the time very easily but choosing the 15, 30 or 60 minute timer and the sound will play until that time is done and the machine will turn off.  I liked all the sounds with the exception of the White Noise it was just too much for me.  The Rain and Ocean were my favorite and I tended to use them more. For the size and price it is a great little machine and works like a champ [This review was collected as part of a promotion.]