As often as brakes need adjusting, I think you have a solution looking for a problem.

The front V brakes on my 2008 Specialized Globe would throw you over the bars if you weren't careful.
I went to the Kool Stop Wet-Dry (2 compounds) pads to reduce braking.

I think you need to look into the condition of the rim braking surface and current pads.
It'd be embarrassing to have your friend spend the money and have worse brakes.