I used the circular saw very actively all summer, built a frame house and assembled the formwork from a board for an area of 120m2. I used it for several hours a day, and even after 3 months of active use, the disc did not become dull at all, sawing like butter. Not a very smooth protection cover, sometimes it does not open itself at the beginning of sawing and you need to forcefully lift it with your finger in order to cut further. Otherwise, a great tool, I recommend it to everyone - the quality is super and the price is adequate.