I had a 1997 Roadking with a carb that I put 35,000 miles on. Never a carb problem one.
In 2003 I bought a new Roadking with FI. Now it has 40K miles on it and never a problem with the FI. Nutshell, the FI seems to have better throttle response and is more user friendly on cold starts. But a carb bike still has some advantages as well, as folk have stated in prior responses.
I was recently in an Independent cycle repair shop that works on Metric cycles mainly. The owner is always working on metric cycles where folk let them set, DIDN'T ride them and the carbs get all gummed up. With the FI being an enclosed unit, this is not as big of an issue, from what he said.