This is probably my favourite buy in the last 6 weeks. Simply because I got a hell of alot of equipment for the money!
Firstly, this isn't a small bit of kit. It's nearly 6" tall but is made out of an EXTREMELY hard plastic, feels very well built and isn't cheap at all. I would buy this light stand over all the others on Amazon.
The brace to hold the hot shoe in place is made out of metal and is fully adjustable. I've managed to fit it onto the light stand with 2 umbrellas, a 565EX with triggers and have it mouted as high as possible and it hasn't given way. Fantastic bit of kit,
Only thing I will say about it, is when you adjust the angle of the umbrella, it makes a loud clicking noise. This isn't a bad thing, because it allows you to make more accurate and secure adjustments. But it's very disheartening at first!