As a former cleaning manager at a hotel, I knew the sensor was used across the industry and was reliable. A real workhorse. This is a durable vacuum cleaner with excellent performance. Pros โ Rack mount accessories, quietness, cable length, and performance! Assembly is easy. It was delivered within 3 days of ordering. A couple of minuses - there is no light in front, and the vacuum cleaner is heavy. Disappointing - why didn't I give it a 5 star rating. Mine blew up (blown motherboard) after 2 uses and I had to go to an authorized repair agent after calling Windsor direct and running some diagnostic tests. For $$ that was disappointing. But I knew that in the long run it was a vacuum that I would have for years to come. If you want a good vacuum that will last you have to invest. And Windsor is definitely a good investment.