Hmm, I flew the clipper for 2 weeks (might go back to it), and I used a docking computer since the day I bought it. Not once it crashed into something.
I don't do anything special in my landing: If I'm lazy, I activate it as soon as I'm in range (7,5km) and alt+tab into my browser while it docks or go get a beer or something^^ it's longer than docking manually, but I find it more relaxing.
But most of the time I fly manually through the gate and then activate it, but you have to be carefull that your ship is fully inside, or the dc will want to go to the queue position (that means flying back out...not really pretty with a big ship like that^^)
That way it's faster because the computer is really good at landing this beast onto the pad whereas I had some "problems" usind the vertical thrusters (they are soo weak...)