I'm currently looking at Etihad as a cheap way to fly Sydney to London and Dublin to Sydney in April. The 2 nights free hotel accommodation seems attractive as I'd like to break the trip and haven't seen Abu Dhabi before. My question is, do you need to book the flights on Etihad website to qualify? Or will a third party provider do? Also, any comments, tips, warnings on my proposed flights? I flew Etihad to Paris a couple of years ago, it was a bit cramped but OK.