Very good, but perhaps not perfect for sleeping in darkness
There is a lot to like about this noise machine, and I think it's a great value.  Its a convenient size and has a nice aesthetic.  The speaker gets sufficiently loud without quality suffering at high volumes.  I like that it has a USB charger and battery power option for traveling.  More than enough sound and lighting options, if you care.  However, if you intend to use this for sleeping, be aware that there are two small lights that will remain on, preventing a completely dark room without modification.  The timer light (yellow) always stays on and the battery indicator light (green) remains on while it is plugged in.  Not a deal breaker if you can place the machine somewhere to minimize the light, but something to consider if you prefer sleeping in total darkness.  This wont matter to some, but is a minor inconvenience to me.
Rating: 5 stars