I was one of the few who got this band in the first sale. This is an excellent piece of technology and nothing comes close to beating it in term for value for money. Three days ago charged it to 100%, and now there battery is sitting at 85% with everything in. Notification, heart beat check every minute for last three days. Everything works great. One issue I faced was watch faces were not available, but I found a turn around for it and voila WF are also excellent and available. Go for it. Update 1 week later: lost 2 kg since using. Will keep updating every week.