I've been using this product for over 2 years now in my home studio, and I'm totally satisfied with it. The product lived up to my expectations.
Since the K&M 21070 Black arrived to my home studio, I have been using it with my NT2 A condenser microphone which is mounted upon an SM6 shock mount with a pop filter. So it is under a lot of weight: I never take the shock mounted microphone off of it, only put a dust bag upon it for cover, and leave the mic stand in a way that it does not reach sideways. This way, every time I have to use it, I just adjust it quickly, and I am ready to record.
I had only once accident with this stand, namely the screw that holds the microphone's shockmount slowly let go the shockmount, and after a recording session, the shockmounted microphone abruptly fell on the ground. However, I realized it was my own fault, since every time I adjusted the microphone's angle, I unscrewed it a bit instead of adjusting the stand itself. :)
All in all I am really satisfied with this product, and I eagerly recommend it to anyone who wants to have a nice sturdy microphone stand in their home studio. :)