I purchased the S+ from Amazon a couple of weeks ago after reading several reviews on Amazon. There seemed to be a bias about the app. Android people hated it and IOS users were much more favorable. Having both types of device I opted to use the IOS.
I started getting scores in the 60's (75 is average) but following the tips and by paying much more attention to sleep hygiene, I am averaging in the 70's and 80's now with one night of 91.
Overall I think it is an excellent product based on my limited experience.
Bottom Line: Yes, I would recommend this to a friend
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