Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Stopped working shortly after purchased

The Frother appears to be built well; I really liked the stainless steel construction. However, out of the box, it didn't work that well: would spin very slowly at first and then ramp up to a higher RPM. Once in the milk, it would bog down and stop spinning until I pulled it out again. I replaced the included batteries thinking they were bad, but it didn't help. Finally, after about five uses, it quit working all together. Maybe I got a lemon...