Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not a good tool

I installed 8 sheets of drywall, it worked well and then the tool stopped driving the screws through the wood. I THINK it's the bit, but I can't test that theory because the kit didn't come with an extra bit. If the bit is the problem, how is it possible that I will have to change a bit every 8 sheets of drywall. A 2 pack of bits costs $8. DO THE MATH.I can tell you with 100% confidence to NOT buy this product, you will waste more money buying bits for this thing. POOR BUY on my part, I am very unhappy.