No thats all very true, I personally have worked flat out for the last six month and not a penny in overtime. Also alot of what you do does not qualify as credit, sims, SEP ect but its all still work (but no money!)
In addition you will have to complete numerous and time consuming on line training courses for the company, this is in your own time and gains no credit.
The flying is not easy to accumulate, sure there are some long haul but its mixed in with alot of crap and the bidding system will not help you much.
you will work to the limit basically each month. Personally I cannot remember an easy month.
If you are comming from a civilized country think very long and hard, you may or may not be aware but you are protected by some fairly good employment laws and rights, here you are not, they can and will do what they like when they like.