During the first 2 months this was a lifesaver. You get so tired that it’s hard to keep track of when you last fed or changed the baby. We mostly used it to track feeding times so we could understand when Archer might be hungry vs. just need other soothing. We didn’t use it so much for changing or nap time as newborns sleep when they wan to and we changed him before every feeding which was every 2 hours or so.
If there’s one thing I’ve learned as a Mom the key to a happy baby is anticipating what they’ll need when (food, sleep mainly) and get ahead of the fussiness.