Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Frustrated Porter Cable Fan

I'm a contractor, and I've been a loyal Porter Cable customer for a long time. I own many P/C tools. I purchased this 12v drill as a replacement for a DeWalt 18v drill that I felt was too heavy and cumbersome for all-day use. Now I'm sorry I sold the DeWalt. This 12v has caused many frustrating moments on the job site...poor battery life, faulty keyless chuck (very annoying), and a 2-speed gear switch that sometimes slips into neutral if you're not careful where you grip the drill. I just can't recommend this drill, which is unfortunate for such a Porter Cable fan.