In general, there were no complaints until the repair began and began to work with the device constantly. There is enough power to drill through a partition, or a brick (with a drill bit). But, there is no declared drilling in concrete (up to 13 mm) in our monolithic house, except for 13 mm maximum depth, and not diameter. And even with constant work, you begin to notice little things that, with rare use, are not striking. For example, that the reverse sticks, and turns on every other time. That the cartridge is planted crookedly and the drills frankly walk. And then you begin to understand that the blue Bosch has nothing to do with the professional series.