I use a bucket w/spigot as a primary, and then straight to keg. I unscrew, sanitize and scrub the spigot every time I'm finished brewing.
I love it and I will never have any problems with it. Ok, there's always a chance however slight
Although there's the visual aspect to this carboy, I wouldn't bother with this set-up. I wouldn't want to clean a carboy, not matter how easy some people think it is