Who has tried this? Is it as great as everyone says? Also - how on earth do you get one, every single size small is out of stock on their website!!

My LO who is almost 12 wks has never let us swaddle her arms awake, we finally learned the trick of getting her to sleep first and then swaddling them so she was less likely to startle herself awake. She usually would bust her arms out halfway through the night though. Now she's doing it within a few hours and being super flaily with her arms and scratching her face so I really feel like this would help!