"If your doctor gives you orders for imaging (ie, x-ray, ultrasound), take them here. It doesn't matter if they were written for another imaging center (such as Desert Radiologists), you can still use them here.
The two locations I've visited: very quick, staff is extremely polite & customer-oriented, they worked me in without an appointment, professionals are quick and, well, professional.
Why sit in a mass production line over at "The Big Boy" that has locations scattered all over town? This company's locations are small, fast and are very customer-centric.