In all reality, it takes a world war to get me into a long distance bus.
Train first preference by far, but life’s too short for what you describe. I can be in Belfast several times a year for various reasons. As it happens I’ve had to be there several times recently.
Bus all the way.
Perhaps it’s a throwback to early memories of first class corridor coaches steam hauled, and silver service dining car, but I simply will not go to Belfast in a 29 or a CAF.
If that’s the option - bus.
I’m afraid I won’t go to Wexford or Rosslare in a litter-strewn, filthy 29 either; though while an ICR is light years better, they crawl along at walking pace - the DSER service, which could be SO good, is an utter mess and has been since the late 1960s.
With IE owning a port down there, surely they can employ a cleaner to swill out incoming trains at Rosslare Bus Shelter Halt?