I really like this product! Been using it for my newborn, and it definitely gives you one less thing to stress about. Its nice that it comes with an extra battery as well. Easy set up, links to your phone. More than one person can download and use on the same account. Just need to use the same email.
Super easy to setup over Android and iOS. Though you can only be logged into one device at a time. Had to shift the sensor to one side of the diaper until my baby's belly button fell off, so the directional detection was a bit off sometimes, but it usually would eventually orient itself correctly. App shows baby orientation, breathing, and temperature, which is really useful to make sure everything is in order. It's easy to turn the sensor off as well in the app in case you purposely remove the sensor or put the baby on their belly. There are a lot of settings available so you can tweak sensitivity and alerts to your taste. It's also nice how they use a a pretty common battery type so I'll be able to replace the batteries easily and cheaply. The clip is a little hard to get onto a diaper, and it does add up to a lot of work if you have to change diapers frequently.