Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An absolute dud...I wasted my money, so save yours!

In my opinion, this thing is flimsy and worthless. I set it up in the doorway and it is so poorly designed that it just doesn't hold. Once you bring the bar crashing into your forehead on your first or second chin-up, you realize that you've already thrown away your money and now it's time to throw away this product. I ABSOLUTELY agree with the reviewer who cautions against making this product available to kids without close supervision.