My dad had a 750 Vulcan, now my little brother has it. I've ridden it quite a bit, including a ride from the Seattle area to Rexburg, Idaho. It has a pleasing engine, plenty of torque, as mentioned above. It will get 50 mpg while traveling if you are smooth on your throttle transitions. Which is good because it has a small tank. The seat bottoms out after less than 100 miles, and it is a little cramped for someone 6 feet tall. Put a duffle bag behind you to lean on, and you can easily run through a tank of gas before stopping. The engine is more modern than the SOHC 750 and it shows. Kawasaki designed the bike back before they (and the other Japanese makers) realized the cruiser crowd wasn't interested in refinement, so they put on decent brakes, liquid cooling, shaft drive, DOHC 4 valve heads, adjustable suspension, and all that other sissy stuff. They also made it ugly, but that is a matter of taste. My dad thought it was beautiful. He rode it until he was 76 when health problems made him give it up.
If you like cruisers and like the way it looks, it is a good bike.