Good professional police officers doing a dangerous, thankless job. However, the first segment illustrated bad intelligence on a grand scale. The last segment showed a bad approach to the scene. What is stealthy about two unmarked maroon vans following closely together? Otherwise, these guys are great! By the way, Dallas is a terrible place - from "uptown" to downtown to the suburbs to the south side - it is a degenerate city that resembles the worst aspects of any northern or eastern metropolis like Chicago or Boston.
It also has some of the same horrible attributes of Los Angeles. It is a challenge for these good police officers to work in a "city" like Dallas.