I assume you mean 'bent' as 'curved', rather than 'flexible' ?

I'm not sure about advantages, but from experience I can say that there are no real disadvantages. May require a bit of manoeuvering in initial stages.

The is a French site that got going about 10 years ago for and by men with a curved penis.
Le site des penis courbés

There was a lot of exchange of experiences in the first years, but it's pretty quiet now. Different people had different experiences, and the most curved were not necessarily ones with negative experiences.