The information is great, but there are constant and ongoing issues that cause data loss, or make the processing of data such a long and inefficient process that it can't be used to tailor your day. Sleep data often doesn't process until almost 24 hours later, and thr device constantly loses connectivity even if the app is open with the phone nearby. I also don't like the random sleep time suggestions: it doesn’t get shown every day, and you can't adjust your personal wake time in order to get a relevant and applicable sleep time, which makes the feature arbitrary and absolutely useless. This app needs a lot of work, and more honesty and transparency from the company with respect to limitation and capabilities. This should have been carefully developed and troubleshooter until it was truly an improved version of the last sensor, instead of being rushed and pre-ordered and riddled with problems.