Tech: Owlet Smart Sock

So, I've been scouring the web for cool smart gadgets that are baby-friendly and have great design and found this one called Owlet.  It's a "smart sock" that is trusted by over 100,000+ parents (that's a good sign) and uses a proven technology (pulse oximetry) to track your infant's heart rate and oxygen levels. I was surprised by the range of the sock, 100 ft, but I'm sure you wouldn't leave your newborn even more than 10 feet away. I'm curious on the accuracy of the wearable and the comfort level for the baby. Love the colors and the Owl logo. Let me know what you think of this wearable in the comments.