First time I've ever seen a "rain chain" before. Looks cool, but I can't imagine it works all that well with the heavy rains we've been having this year. This isn't the best place for these pictures, but I'm not going to start a whole new thread for it.
Here's a video of one in action; even looks to be the same design.
The rain chains that I've seen tend to look like the rooftops of pagodas. I'm not sure how they'd do in a place where it's either bone dry or torrential downpours.
"There is nothing in the world so permanent as a temporary emergency." - Robert A Heinlein The Moon is a Harsh Mistress