In general, a very convenient thing, I regret that I didn’t buy it earlier)) Mains power is beneficial, if you don’t use the tool all the time, you won’t have to spend money on new batteries in a couple of years. The only thing that bothers me is the low durability of the shock bits. You can try to buy an expensive one - this is 500-700 - but there is no guarantee that it will be stronger, for small volumes it is more profitable to break two or three bits at 130 per pair))) And so the thing is very useful, I didn’t turn a single head at the screws, and didn’t crush it (although I don’t twist the black ones). The only thing to remember is to firmly press the bit against the self-tapping screw so that it does not hang out in the slot - otherwise the tip will break very quickly. Good luck to all!