Great road .. I prefer doing it south to north (Inveraray to Dalmally)..watch out for police with speed gun occasionaly on a straight just a couple of miles north of Inveraray.
Short, sharp and really well formed. I usually take this route from north to south, before heading west to take the coast road to Oban.
A short but fun blast down a quiet well surfaced road, with some good corners. Well worth doing if yuor in the area.