I haven't personally used the Swaddelini, but I've heard mixed feedback from other parents. Many appreciate its unique design, as it provides a snug yet flexible fit which can help soothe some babies who struggle with traditional swaddles. In terms of ease of use, many find it convenient since you don't have to wrap or fold like with blankets—it’s more like a wearable pouch.
Safety is a top priority for any swaddling option, and the Swaddelini does meet industry standards, but as with all swaddles, it's important to monitor your baby's temperature and not use it once they start to show signs of rolling over. Some parents have mentioned it can be a bit pricey, and fit may vary depending on your baby's size and shape, so it's worth checking sizing guidelines carefully.
It might be worthwhile to read a few reviews or watch demonstration videos online before making a decision. Consider having a couple of different swaddling options on hand to see what your baby prefers.