I've had one for awhile in my AirCav list. The old list had Straken and a fattened CCS meant for assaults, and the medic was worth it at that time.
Now, though he's cheaper, Straken's CCS in my AirCav had less men in it. Including the Preacher, they're now 6, in a Vendetta. But because I like my converted medic so much, I decided to still include him, along with 3 plasma gunners (just to help justify the medic's existence there). Haven't tried em out yet. I'll let you guys know.