As a new buyer, I was looking for a powerful and durable sander. As a result of my tests, I determined that this air-powered sander is perfect for heavy-duty sanding projects in the industrial setting. The random orbital motion ensures smooth and even sanding, while the non-vacuum design eliminates the need for frequent filter replacements. The ergonomic design ensures a comfortable grip and reduces fatigue during prolonged use. The only drawback is that it's quite noisy, but that's understandable given its power. Overall, a great investment for anyone in the industrial and scientific field.