My wife drives at least as good as I do. She is a farm girl, can shift the 915, dump truck, back hoe and also back up a trailer with one or several axles (including steering axles). I never had any trouble at the boat ramp launching the boat and her backing it up. I think she was a true exception at the boat ramp, every other guy had to back it up themselves, jump over to the boat etc.
I feel safe too with my wife driving. I take long naps on road trips and arrive relaxed. Friends always ask "how was the drive - you must be tired" (addressing me). Of course I answer that I am feeling great, as I slept most of the way catching up for lack of sleep during the week.
Cheers,
G