I personally have one of these and have slept in it a bunch; I didn't have much trouble going to sleep without it, but it definitely helps me fall asleep faster and stay asleep longer! Yes, it's basically a stretchy, human-size pillowcase, but it really does feel like a gentle cuddle or hug all over, all night long. Oh and it's machine washable, which is key for anything I sometimes use for 56+ hours every week. The latest version even makes it easy for you to slip your feet out if you wanted to!
Mal Mower, another writer here at BuzzFeed, also uses one and swears by it! Here's what she had to say in her Hatch Sleep Pod review:
"I recently replaced my weighted blanket with a Sleep Pod and I am never going back. I appreciated the comfort that I got from a weighted blanket, but it was so hot I wasn't able to last under it for long. It was also so heavy I couldn't take it with me anywhere. This design solves those problems. The fabric is breathable and so lightweight I can comfortably use it in the summer and I can throw it in my tote bag on vacations. I feel calm and comforted every time I get in. I've used it while napping, while trying to calm down before going to bed at night, and while sitting on the sofa/needing some extra stress relief when binge-watching Chernobyl got too stressful. I can't rave enough about this thing, but I'll certainly keep trying!"
Get it from Hug Sleep for $79.99 (originally $110; available in sizes S-XL, as well as kid and tween sizes).