If I could give it back I would. Never use it and never will.
When I first read of HSC I thought, "Why would anyone want or need this BS!" It sounded like a solution in search of a problem, something that a geek, who had never ridden a motorcycle would invent, to "make it better
for all us poor, incompetent riders."
My habit when approaching a stop was to use the front and rear brakes to slow down, then as I came to a complete stop, to use only the rear brake. At the stop I'd keep my right foot on the brake lever and put my left foot down to support the bike. When the light changed, I'd release the brake, quickly put my left foot on the peg, and accelerate away.
When I purchased my new bike, HSC came on it and I just figured I'd never use it. Then one day as I climbed a moderately steep hill with a stop sign at the top of it, I noticed that a truck a few lengths in front of me was spilling its load of gravel over the top of the bed. I came to a stop in this gravel, there was no way around it, and I had to put both feet down to keep the bike as vertical as possible and to prevent my feet from sliding out on the gravel. I gave the front brake level a squeeze, activating the HSC. Now free from worry about the bike rolling back when it was my turn to move up to the limit line, I was free to concentrate on avoiding the deeper piles of gravel. I inched my way to the limit line, using the HSC each time, as the line of cars in front of me moved away, sometimes I used the throttle to turn off the HSC and sometimes I used the "flick the brake lever" technique. When it was my turn to go through the intersection, I just gave it more gas than usual and moved away. It turned what could have been a dicey situation into one that was easy and comfortable to handle.
I’m no longer a Luddite when it comes to HSC. Now I'm a fan. But then I'm also a fan of ABS, self‒cancelling turn signals, ESA and the rest of the suite of computer driven/assisted features.