Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This costume is OUT OF THIS WORLD great!

Bought this for our eight year-old son, he wore it for three days straight! It's lightweight, so can be used in warm weather (or cold with layers underneath. It's already paid for itself in entertainment value, and we still have three weeks till Halloween!SIZING: BUY the next size up! We purchased the 12-14 for our eight year old who is about 55# and 52" tall. It's just right. It's roomy (great for effect, and for a layer of heavier clothes underneath if needed). He should get at least another year of it.