I already had a Manfrotto Magic Arm, but wanted to try the Manfrotto arm with a friction knob for tightening, and I can only recommend this model over the somewhat awkward <
This Gitzo tripod is different than most tripods - even Gitzo's own. The construction is very compact with legs in four sections and it collapses into a very small package.
I used to own a Manfrotto tripod one generation older than this. The center column could be loosened through a series of operations, and remounted upside down or horizontally.
The Magic (AKA Holding) Arm isn't really magic at all, but a jointed arm that locks with a snap and can hold even a large SLR. It's paired with a Super Clamp.
The Super Clamp is the connection between Manfrotto's arms and the rest of the world. Crudely made, but with an amazing grip. I have four, which will do for now.