I've been a loyal customer of Withings for many years. I've had various scales over the years, bought their new Body Scan scale as well as theySleep Monitor - Neither are cheap. I went all in and also signed up the monthly subscription. In short, the scales have never worked properly and neither has the sleep monitor. I've raised it several times to their customer support team who ask me to conduct various tests, thoroughly clean the machine, reset the machine and send them the results etc. After all the tests, they then said the machines need replacing and they would offer a 20% discount for me to buy new - but here's the catch, I'm not allowed to use the 20% off on the the Body Scan scales because they are so popular! The sleep analyser, they asked me to perform tests which resulted in being no further forward so I'm giving up on Withings, I've cancelled the subscription and will buy new products elsewhere and never buy from Withings again - Just a warning to anyone thinking of buying from this company - unless you want machines that do not do what they are supposed to and a really poor customer experience - You should buy elsewhere.