It was bought during the construction of the house as an auxiliary tool, it helped out a lot and speeded up the work. Of the minuses, very poor dust protection, you need to think something, or buy an additional mesh or invent something yourself. Akb is kept, but this will not replace a fully-fledged network tool, as an option to look for it in the kit without acb and use your own, if of course there is, at least 4 ac. And so two years of work, without breakdowns and headaches.