This tool is a lifesaver!!!!!! I was shopping at the Bethesda store, and ran into the Behr Paint Rep who recommended this tool. I was skeptical that this tool would work, but I was desperate and took a chance on it anyway based on his advice. I rented a hand grinder from the Home Depot Tool Rental Center and was able to remove about 300 square feet of the deck coating in a little over 2 hours. This tool absolutely shredded the deck coating and also smoothed out the wood where it was splintering. It left the deck perfectly clean & smooth for me to re-coat it. I paid $50 for the tool and the grinder rental was $13 for 4 hours. I spent $63 to remove the coating and I saved over $1000 based on the last contractor's quote!! This was the best $63 I have ever spent on a home improvement project.