I can't speak for anyone else here, but I prefer self tensioning guy lines. I set it once and the shockcord keeps the tarp taught. A lot of people use tarp lines that are prussiced to either the tarp or the stake. Whoopie to me are great for hammock suspensions, but not so much for tarp guy lines. For instance if I wanted to tie off high to a tree a whoopie wouldn't do that for me, where as a regular line works great for it. Just one guys opinion on the matter.