I think food trucks are awesome. I happen to live in a place where they're super popular, and serve up just about every kind of gourmet, specialty, and ethnic cuisine! 
Yes, food truck are good. They provide food on the go
I understand there's even a reality show -- The Great Food Truck Race on Food Network -- have you seen it?
I don't often watch the food network on TV but  I know food  truck serve good food depending on the vendor
Some vendors actually go on to have their own brick-and-mortar restaurants! In my city, there are several who have done that successfully. Fast food may be common, BUT these guys are way above and beyond that!