That is really good improvement in speed and mpg, and I like that the
fairing is prefab (and not TOO expensive) plus simple gearing changes. 45mph to 70mph, 110mpg to 160mpg. I think we are going to see quite a few more "streamliners" after folks realize the low cost and relative ease of this kind of project with those kind of results.
And it looks quite comfortable to ride, laid back and lots of protection from the elements from head to toe (especially if you can keep moving). I've ridden naked bikes year round in the midwest, that looks positively luxurious