According to the Interwebs this truck has been up on Highway 6 and out near Humble, and now appears to have reopened in Spring, on the Dave's Express 2 lot at Kuykendahl and Dowdell. Stopped in the other evening to give them a try. Ignore the pictures on the truck--what they actually have is on small cardboard signs by the order window. They can do trompo, fajita, chorizo and pollo as street tacos, burritos, or quesadillas. The street tacos are $1.50 so we went for those--one of each plus an extra chicken taco. They also have elote (corn) as a side so we got some of that. Washed it down with a jamaica agua fresca.
The tacos came attractively plated with grilled and raw onions and cilantro. They had two salsa, red and green. The red salsa was very hot and actually didn't taste good so we didn't use it. The green salsa was spicy but not as much so, and was very tasty.The kicker here is that we couldn't tell the taco meats apart. They all had pretty much the same texture and spicing. Did we actually get 5 of the same meat? Maybe.
Not sure I can recommend them. The elote was good (quite spicy, they finish it with powdered Takis) and so was the jamaica agua fresca. We suffered no ill effects from the mystery meat tacos. But Flying Tacos is right across the street and offers good Tex-Mex so not sure why you'd stop here. I really don't think the same people own the truck, it looks more like someone purchased it and is trying to make a go of it without spending money for a makeover.
Five years ago when I first started this hobby, the very first review I did was of the Green Lechuga taco truck, which was located at the corner of Gosling and Root, approximately where Mama Juanita's is now. The experience was very similar--good agua fresca, attractive food, mystery meat. So if you miss Green Lechuga and want that specific experience again you could go try it.
My Yelp Review