At first I was very apprehensive because of all the other, much cheaper options on the market but I took the chance. I purchased the bundle with the sleep sack and weighted blanket and I AM SO GLAD I DID!! At 7mo old my son was waking up so many times throughout the night I felt like I had a newborn again. Literally the first night I put this on him he slept through the night. Idk if it was a coincidence or if he liked the weight but he slept!!! I also tried it for nap time one day (he typically takes 30-40 min naps) and he slept for 3hrs! So now each afternoon and night I use the sleep sack. He also loves the blanket, sometimes he likes to cuddle which can be a little challenging because the sleep sack is a bit heavy, but I cover us with the blanket and he goes out like a light. I would 1000% recommend this to those who have little ones that aren’t great sleepers.