So far my Gitzo tripods have held up well over years of use, though I’ve had several reader emails griping about their own Gitzo experiences.
Now I have my own bad experience to add: my very lightly used GT0530 has developed quite a bit of “play” in one of the legs where it connects to the metal ferrule at top, as if it’s coming unglued. It absolutely needs repair.
Though my favorite is the GT3541XLS, I like the GT0530 (or GT0531) not because it is robust, but because it weighs next to nothing, can be hooked over a belt, and works OK with mirror lockup + remote release with even a D3x (with some care). I use it with the Really Right Stuff BH-25 Pro mini head.