No advantages,They're a nightmare.Traditional or semi-Integrated are much easier servicable.
I've bought two bikes with these before,and within a year they were completely wrecked
Some pionts on why I don't like them

1) They scrape the inside of the frame on installation/uninstallation
2) Need special tools to get them out
3) The bottom bearing usually wears out quick,because there is no protection
4) You have to take the whole thing out to check the condition.