I can only speak from experience, I personally know a lot of people who did the p2f scheme with Lionair on the 737ng and also some on Airbus in Tunesia.
Despite of a lot of people saying how stupid they are for paying to work in 3rd world countries..... All of them now have airline jobs some of them are even flying the 777 now and making serious bucks.
Now the situation is a bit worse then lets say 2 years ago, as currently most airlines want 1500TT and 500 hrs on type for F/O jobs but I would say if you are going for the Linetraining your chances of getting a job afterwards will be arround 70%, depending on luck mainly....