I forgive 4 points because of the price but is just too upscale class.
However, the quality is also top! Drivers who make the effort, and a cheap set of bits from the hardware store compares with the bit set of HZ, is not as professional as I am one, very quickly find, that can be really pleasant good tool and allows fatigue-free working.
When cheap Bitsatz I always had the feeling that the screws less wear, such as the bits.
When HZ set is already happened to me, that just the head of the screw was from, but the tool is still in good shape. The Bits just grab neatly into the screw, without having to press the battery screwdriver on the screw by force. It's just more comfortable and with less effort with the bits to work.
Nevertheless, of course, these bits are subject to wear, but so far, the wear is limited.
One should in this expensive bits but also make sure that the bits neatly Greiff, who handles sloppy with his tool, should then maybe stick to the cheap bit sets.