I had an XV 1700 for a year or two with no belt issues. Folklore will tell you that if you get a stone between belt and pulley it causes untold mayhem, my bike had close fitting guards to help prevent this. Eventually replacing a belt can be awkward depending on swinging arm set up. Changing final drive ratios is not as simple, but many of us never do that with a chain drive bike. I would never be put off owning a belt drive bike.