It has about 5 feet of reach. The camera can be underslung,(as in the pics) or mounted up on top normaly. It breaks down quickly and is light weight. It is patterned after the Porta Jibs.
The weight is an issue. I'm pushing the ability of a 501 head, but it seems to hold the weight just fine, no problems here. The cost of the parts was easily under a $100.00, but compared to the cost of a Porta jib it is quite cheap. The tripod and the two 501 heads were the exspensive parts. I also have built a Sky Crane copy that allows tilting of the head, i'll post some pics of that as well.
ADDED: I'm putting about 30pds of weight on the 501 head, balancing is important. I'll probably buy a heavy head in the future.
I'm flirting with making something like this but I keep wondering if the sticks handle that kind of weight. There must some serious stress with the camera on the end there. Had a chance to use it in a practical setting yet?