I would wait to see how it performs first. You never know, it could be fine for what you are going to need it for.
I've never used one, but I tend to think of the tornado fuel saver when I see something like that. I could be wrong though, so don't let me weigh your decision.
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2001 Cherokee Sport -- 40k --
4x4 -- 4.0 HO -- AW4 --
D30 -- 8.25 -- OME 930 coils -- Rusty's full length 2" AAL -- Sensatracs -- 30x9.5 on Jeep Grizzlys -- Homebrew Safari Rack