I've taken several Basic & Advanced Defensive Handgun courses from John Farnam & his wife Vicki.
They are excellent trainers and teachers. Very down to earth. As noted above, they won't teach you to shoot from a moving car, though you may do low light shooting and even "house-clearing" drills in the Advanced classes.
They are knowledgible people, yet they're not dogmatic. They will try to show you what works best for the most people most of the time, but will acquiesce to an alternative view or method, if you can explain or demonstrate your variant idea or method. They will work with just about anybody, from "novice-klutz" to "seasoned gunman", with courtesy, fairness & a supportive attitude. Even if you've done it all before, John's classes will always be worth attending for the "trigger time". He attempts to simulate a little of the stress of combat shooting by making you shoot drills which require good trigger control (you'll see what I mean when he brings out his "combat swinger plates") AFTER you've run your leg of a relay, AND your side will lose if you screw up.
Vicki used to teach Elementary School, so she has a background which is helpful in the communication of didactic information.
See John's website for descriptive information, including "what to bring"; I thought I knew the URL, but I just tried it and it didn't work. I'll post it later today, if no one else does it first.
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"Potius sero quam nunquam."