Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Sharpner-Great Price!

The Drill Doctor 250 is one of those few products that deliver performance exactly as advertised! I was able to restore 40 or so dull bits collected over the years (personal problem throwing junk away)! The 250 gave the bits balanced, sharp cutting flukes that hold up well. The new cutting edges have extended life to my cordless drills batteries and reduced project times due to greater efficiency in drilling operations. The video and operation materials are real straight forward and easy to understand.I've used several power tool bit sharpeners, including the old B & D industrial units. They all worked well but at 3 to 4 times the price. Darex has produced a quality product at a real value price for the consumer.