I got this arm for myself for Christmas and been using it occasionally since then. The arm itself is made out of aluminium if I'm not mistaken and has a hefty weight to it.
After using it for about 5 months I've got to admit it is sturdy and barely shows any forms of usage. The only thing that sort of annoys me is the resonating sound that the springs make if you accidentally bump it somewhere, which in my case happened too often. When it comes to design it's very simple and effective. Only thing I'd change is trying to make the strings not visible, as well as making a channel in the arm to feed the XLR cable through. mines kind of wrapped around it.
In conclusion the build quality is amazing and after about 5 months of occasional usage it barely shows any signs of usage, as well as the springs not making that annoying sound while retracting etc. Design wise I'd change a little bit of small things but otherwise, pretty good mic arm, you as the consumer is definitely getting a lot for the money.