I second most of what Jetstreem posted. Specially about coming over to Dubai first and checking it out before you commit. If you have a family, then its a must to bring the wife over to check it out also IMO.
The outlook posted above on rosters and upward movement on seniority is spot on I think. Whether it works for you or not depends basically on where you are coming from and what QOL you have currently.
Only one small note regarding taxes: If you're american, you will only be taxed on that income that exceeds $99,200 (for 2014 fiscal year at least...), if you make less than that and meet the Foreign Earned Income Exclusion requirements, you wont have to pay taxes on that income. With that said, if you make more than that figure, then you will have to pay taxes, but on the surplus only, and at the income bracket that you would fall on based on the total amount earned for the year.
Best of luck!
V