i have looked all over them.....top notch in my opinion and i would do one in heart beat if i had the $$$ , not sure how you title them and what about emissions and federal safety regulations etc..
I like the factory5 ... I like those wide tires up front. Too bad you can't title a thing like that here.
I have been looking at some of the Factoryfive's (mainly the GTM) to build myself a pure racecar. However I think it's pretty expensive, not in the least because of the transaxle you need.
Otherwise I think it's a neat design they make. However I would have made the boxframe out of alu.