Only purchased as the one that came with my NT4 broke.
On the whole, it feels pretty substantial (it is certainly heavy enough) but in reality, after usage the friction that holds the clip in place gradually reduces and there is no way of tightening it up.
My original (supplied with my NT4) took a bash in transit and the head sheered clean off. It had been out and about approx. 20-25 times. Before breaking, the clip haed had already started showing signs of beginning to slip under the weight of the NT4 used as a drum overhead.
It is what it says it is, but it is very expensive for what it is... I picked up a K&M at the same time but wasn't certain it would fit the NT4, hense buying the real thing, but at less than a quarter of the price of this one, the K&M is the better buy. Time will tell whether it is any more robust though!