Great product!!
The Sleep-Mate I'd used almost every night (even taking it with me when I traveled) for the past 26+ years recently bit the dust and I couldn't get a new one ordered fast enough!  My old one was the 2-speed, but after reading the reviews I decided to go with the less expensive single speed and I could not be happier.  I think the newer ones must be a little quieter than my old one because I used my old one on low and it sounded about the same as this ones does (which, according to other reviewers, is the same as "high" on the new dual speed ones).  I think the fan-like sound is very soothing and does a great job masking other noises.  I'm not a fan of those sound machines that make waterfall, cricket, ocean, etc. sounds.  I find those extremely annoying and they don't drown out other noises - but THIS machine I love!  I'm curious to see how long this one will last, because if it holds up even a fraction as long as my other one did it will be well worth the price.
Rating: 5 stars