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
Food truck
A food truck is a large vehicle equipped to cook and sell food. Some, including ice cream trucks, sell frozen or prepackaged food; others have on-board kitchens and prepare food from scratch. Sandwiches, hamburgers, french fries, and other regional fast food fare is common. In recent years, associated with the pop-up restaurant phenomenon, food trucks offering gourmet cuisine and a variety of specialties and ethnic menus, have become particularly popular. Food trucks, along with portable food booths and food
in outlandish burgers, another may serve only lobster rolls. Food trucks are now even Zagat rated.
Tracking food trucks has been made easy with social media like Facebook and Twitter, where a favorite gourmet truck can be located at any moment, with updates on specials, new menu items and location changes. In fact, it could be argued that social media was the biggest contributing factor to the breakthrough success of the gourmet food truck.
Food truck rallies and food truck parks are also growing in popularity in the US