I recently learn about this item from a friend who say that this brand and product be very popular in the U.K. pro : keep toddler leg from be able to spread to get out of crib no need for extra blanket , this be pretty thick fun and colorful pattern two zipper that make it harder for toddler to escape -lrb- but still possible -rrb- \ great for cold month little fading after several month good quality we toddler be 35 inch long and there be still plenty of room to grow in this large bag so far we toddler have not try to get out of the crib after several month -lrb- the entire reason why I purchase the bag . . to keep we toddler in the crib longer ! -rrb- negative : very hot for a summer time sleep bag ! my toddler sweat really bad in the bag and there be not any hole to release normal body heat . we have to space the two zipper a part to create a small hole to release heat . we also have to keep we house tempature around 69 to 72 in order for we toddler not to get too hot -rrb- you toddler may just have to sleep in this as they pj and they diaper . the arm hole be way too big . sometimes my toddler yell `` stick '' over and over again in the middle of the night when he arm get stick inside the sleep bag -lrb- can pull he arm inside the grobag -rrb- . you may find you toddler have this on backwards in the morning since they can pull they arm easily into the sack and roll over inside the sack . it make I a little concerned that he might get he head stick inside the sleep bag -lrb- aka grobag -rrb- but that have not happen yet . it appear only the arm hole be too large -lrb- but at least it allow some body heat to be release from this thick bag -rrb-