I had a 1978 Moto Guzzi V50 (500cc) street bike, that had three integrated disc brakes, operated off the foot pedal. From what I remember, on that bike it worked pretty well, because it was relatively light compared to my '98 Guzzi V11 and '83 GW standard. The bike would "squat" under braking, as opposed to "dive", so I got used to it on that particular bike.
However, on the '98 Guzzi, I didn't like how the linked brakes felt, so I got some parts from Cycle Brakes and delinked them. Only thing I didn't get from them was a new front master cylinder, since I had a Brembo one available. One neutral, or even negative result of delinking the brakes on my Guzzi was how the rear brake felt. Very little feedback, if at all, felt like I was pressing down on a block of wood. But with two thirds of the brakes up front, being able to haul the bike down from speed with the front lever made me immensely more comfortable and confident. I see that as something I'll eventually do to my '83 GW, but I'll do it all at the same time (rotors, pads, s/s lines, master cylinder, etc).