I once had a bike with belt drive. I think they're kind of cool. To me, the belt's biggest advantages are that you never have to lube it and there's no oily mess when you're handling the bike. Biggest disadvantage is the additional work when removing/installing the wheel (like for fixing a flat). I think the pros and cons of the belt itself are less of a consideration than those of the drivetrain types that it's compatible with, i.e., single speed, fixed gear, and internally geared hub. If you want one of these systems anyway, belts are great. But if you like derailleurs and you're "settling" or compromising for the sake of the belt... NOT worth it. On my bike, there were more things I greatly disliked about the IGH than what I enjoyed about the belt, so I got rid of it. I think I'd really enjoy a simple, durable, single speed bike with belt drive.