The Houdini is great for backpacking, climbing, hiking and paddling. I use it clipped to my harness for a layer at belay stations, a quick layer on windy ridges, and a bug layer that the no see-ums and mosquitos can't bite through and when its hot out this is way more comfortable then wearing your rain jacket as a bug proof layer.
This review was written in the old system and had content requirements that are different than reviews written today.