Despite some apparent fragility, particularly when it unfolds, my gun-600D + 18-135mm (1 Kg) held stably in all positions. The presence of spirit levels assist in framing, and horizontal movement are sufficiently fluid to film. With such a low price, this tripod seems ideal to start the photo. (Do not expect miracles).
However with higher weight, I'm not sure we can block it vertically in any position without the risk of breaking the screw. I do not know how long it will take, but I hope it will allow me to make beautiful pictures of starry nights and other landscapes ...