Wow never seen such a frenzy to sign up to a scheme.
The guys i know who went to qatar are happy to have left.
Your passport is held by the chief pilot when you get there so you cannot leave anywhere.
The airline has access to your bank account and can freeze the assets to prevent you taking any money ... and yes it has happened pilots handed in their notice and then went to empty the account only to find out that the airline had frozen the account.
A country which treats people with little or no respect and guys are lining up for this pay 100k wow CTC have done a brilliant marketing scheme and really pulled in a lot profit.