I wanted to try ... enjoying an interesting promotion, I thought why not ... But it is expensive bedside lamp New Age ... because it serves no purpose other than to make light can fall asleep to music and wake up the same ... The sensor put under the mattress despite moults calibration attempts, has never been fucked to capture my presence on the mattress ... And yet, I weigh more than 100Kg ... So for me it's a big hoax as the watch Withings activity elsewhere ... So do not buy it, it is useless ...