Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Leaks on first use...

After burning my first blender up from repeated use, I was highly disappointed when I bought a second blender only to find the caraffe leaks before its first use. Terrible design flaw as there is no way to tighten the bolt holding the blade. Do not purchase this product, luckily I hadn't tossed the box yet.