This is my first time having a white noise machine. I’ve always been the type to sleep with a fan on, even if it isn’t pointed in my direction.  This machine offered 36 different sounds to better cater to any individual. There is plenty of volume range if you like a more quiet or loud sound. The machine powers on right away, no need to hold the button down for a prolonged period of time. The sticker stating to unlock first was definitely helpful. The timer is a nice bonus, in case I just want the machine on temporarily. The battery life is good and it charges easily. Overall, I have been pleased with this machine and am sleeping better as a result of it.