Incredible value for money! Sure, there are better products from bigger brands, but at this price point this is the thing. I have several of these (probably 4 or more for 2 drum sets, for around 4 years now), and I do live shows and rehearsals with them, and they never let me down. One of them holds my 21" ride, other one my 20" rock (heavy) ride, both at the fully extended arm (!) and they don't budge! Beat that!
I am not a pro drummer though, so if you are, you might check other things out, but I stick with these, and I keep coming back.
P.S. I have almost all Millenium hardware (snare stand, cymbal stands, rack, boom arms, memory locks, etc.) and it is mostly truly sturdy and practical, especially if you get the "pro" line (like me). There are some exceptions, but this is not the one.