Our company now considers the DUB option as acceptable for work flights - the costs are similar (or even lower) than direct and the travel experience is significantly better - but it depends what your final destination is at the end of the day. One thing is that you have a much greater confidence in making connections at the USA end - we have to allow 2-3 hours for onward connecting flights going direct but using DUB you can easily make a 1 hour connection every time