The pretzel loop isn't boring at all, and there are basically only 3 layouts for flying coasters in the U.S. (S:UF, Vekoma style, and the one at Elitch) and maybe a total of 4 in the world(AIR). So they are a fairly new type of coaster, like the 4-D, so I'm sure it will get more interesting in the future.
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MMM Giant Pretzel @ Great America *drool*