The "Quick Clamp" is good. A couple of my friends use them a lot, and for what most people need, it's great.
Since I have ADK-TLs which are some of the heaviest mics around, I made my own from a steel C-clamp and welded flanges so it has a wider grip on the table... it just says "holy shit... that's not going anywhere", and that's what I wanted. But if you have normal pencil type mics or actives, the quick clamp should be fine.
The standard "superclamp" only works good if the table has really square edges. If it has a radius or bullnose, it won't grip.