5 stars because this is the only thing that helps my baby sleep. She fought the swaddle, I wish I bought this sooner. Ive tried the halo sleep sack but she has a hard time in it. This product actually works. Id say this is now in my top 5 for essential baby products. Since it helps us all get sleep it gets 5 stars but its not perfect. We live in California so we even get 70/80 degree days in February and this sleepsuit is hot! I have to leave it unzipped with the fan blasting. It won't last through summer, but great in the meantime. I have a tall 4 month old, definitely size up.