I received several wearable blankets as baby gifts and hand me downs.  This one I got second hand and it's still my favorite.  The 2-way zipper is great.  Easy to get it on when baby is sleeping -- without nicking the chin fat in the zipper, because there's no need to match up the zipper pieces at the top; just zip it up from the bottom.  The fabric remains soft and plush, not pilled or rough.  It fits baby well in the upper body.  Other versions are baggy in the chest and armpits; I think my baby could actually get an arm stuck in the armpit hole on those, so I will have to save those until she gets bigger.  But the zzzipme is true to size.  It's nicely tailored in the upper body and then gradually tapers out, while still remaining slim, so it's not a big tangle when baby flips over in the crib.  Still plenty of legroom.  Glad it's 6-12 month size; my baby was swaddled when she would have fit the smaller size zzzipme.  So for gift giving, I would go for the larger size, when baby is more likely to be done with swaddling.  And maybe get a gender-neutral color because it is going to last for several children, perhaps several families even!