I love this sleep sack! I really like the zipper from the bottom feature, because it does making changing him during the night very easy. I do find that the zipper enclosure at the top can sometimes open, so you just have to make sure you're always properly inserting the zipper before pulling down.
Love this sleep sack, it is so soft and snuggly warm!! I am nursing my son and he is still up through the night - I love that when I pick him up he is nice and warm, so i don't worry that he's caught a chill :)
Also the zipper is covered in the neck area so there is nothing hard rubbing against his skin... and the Zipper access is great (from the bottom) makes it easy to change a diaper n the middle of the night with out having to take the whole sack off.
Love this SleepSack and would recomend it to a friend !!