The Gibraltar SC-4425STMB Splash Boom Arm is great. Well-built, sturdy, looks nice, has lots of position options and is very stable. The only problem is that it is too small: the main pole is too short, and the two boom arms are also too short. As a consequence, everything must be fixed at the extremities, which is not ideal for stability. It wouldn't hurt Gibraltar to spend a little bit more of metal to make the pole and arms longer.
Otherwise, great product.