Didn’t know I needed it but got super lucky by putting it on my registry. I am a FTM and I’ve put my babe in this as often as possible! It’s so convenient for changing, which is especially helpful in the first month or so! The built in mittens are a huge plus and it’s so soft! My babe wore it from birth (~7 lbs) to about 12 lbs. Her arms grew too long for the mittens at about 1 1/2 months.
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is Perfect Fit and 2 is Runs Large