I've been keeping some of the small Figure 9 tighteners in my shelter kit for quite a while. I like how fast they are to put up and, and just as importantly, take down. The small ones work great with para-cord and jute twine. I also like how easy they are to tighten if you line stretches a bit like para-cord tends to do. A USGI poncho, some cord, some Figure 9s, and a few lightweight aluminum stakes gives you a ton of quick shelter options in a package that weighs very little.
I haven't tried the type with the clip yet.