I have assembled my stand and I notice that whilst the left hand side is solid, the right hand side rocks back and forth inside the main upright and makes a noise. I have moved it around the room to make sure that the floor is not uneven, but the noise is consistent. I have also disassembled and reassembled the stand to check that I hadn't made a mistake when first putting it together. It seems that the right hand down tube is slightly too wide and the leg can move inside it.
I have a few ideas to try to stop this noise, which happens even if you apply weight to the top of the stand. I am only slightly disappointed by this, it's not a significant problem, just annoying.
Apart from this, it seems like a high quality product which I would still recommend. I am also pleased with the efficiency of Thomann, from whom I had never purchased before.