The metal clamp and boom arm themselves are good, quite easily adjustable and stable, but the quick set clamp that keeps the cymbal in place is rubbish. The little piece of plastic wears out quickly and after a while it will just pop off every time you hit your cymbal. I had to buy wingnuts separately just to keep my cymbals in place.
You're better off just buying a clamp/arm made fully of metal parts.
I have a couple of these which I use regularly and think they are great. They give you all the adjustment options you could need, and hold position very firmly - not had one move on me yet! The only possible problem is the short boom arm. For me, I have Tama RoadPro cymbal stands with long boom arms too, so I simply swap boom arms if I need more or less length and that works perfectly for me.
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