My aunt got me the Snuggie. You are supposed to put your arms through it so the material lays on you like a blanket. And that's all you get :( There is not enough to cover completely around. My bathrobes cover more than it does. And the actual Snuggee material is fleece that pills and falls apart. Have to give that one a thumbs down even though I love the bubble gum pink color. Thank you Auntie but it is rotting away in the back of my closet.
My snuggie came from Spencers so it's not technically a "snuggie" snuggie. Mine is really nice fleece. Completely covers me (then again I'm short). Also, its not meant to go all the way around... that's a straight jacket. It's merely meant to keep your front warm while your facing upwards.
However, I've also put it on backwards to sleep in (since I sleep on my stomach) and it worked just as well.