When you look at other options this is a very solid piece of machinery but I did add liquid nail to the screws because they would loosen from the constant vibrations that's probably the only thing they could have done better. They could have used the blue loctite for the screws to not loosen. And maybe adding a cheap open end wrench to the packet to help put it all together.
Using daily with up to 40kg, no problems so far. Easy to configure, with the centre piece being removable if you wanted to use another method for stacking weight. I use sandbags, held down with a strap, cheaper than weights.
KTrib 
