Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Ok, but...

The performance of this item was a little disappointing. Making milkshakes isn't as quick and effortless as I would have hoped. We routinely have to stir up the contents of the cup to get all the chunks of ice cream broken up. And they usually just stick to the shaft of the mixer. If given the choice again, would not purchase this item.