I have previously been two other brand products purchased (portable Softbboxen) and have been pleasantly surprised.
For the price, I am convinced of this product (flash bracket + umbrella holder). The flashes can be very easily attach to the outer rails. Just unscrew easily solve.
Unfortunately, and therefore a trigger, said screws have fallen short. They should unscrew carefully, otherwise you turn out very quickly throughout. No major shortcoming when the rails used in the studio. Annoying if you order is on the way out and a screw escaped ...
Nevertheless, strong buy recommendation. For the price, top product!