Pretty good white noise
We bought this machine for our baby's room, which faces a busy street. In does a decent job, but all-in-all I think I like sound of a fan better. I read quite a few of these reviews and found some people who think it's too loud, and others who think it's not loud enough. I think the real issue is the pitch of the sound, which is noticeably higher than the sound of the fan, so it doesn't do a great job masking low-pitch noise. Perhaps the larger model would do a better job. I would recommend finding a place where you can hear it for yourself before buying it.
Rating: 3 stars