ive done boston to philly. fung wa and whatever else.
the good:
you dont need a case, i just locked mine to a pole where all the luggage was
once they moved me to the front of the line, which allowed me to get a good seat, also if they hadnt i would have had to take the next bus since the line was so long
the bad:
once they charged me an extra ten bucks
if somethin' happened to my bike... well they have never heard of insurance im sure