The TRSS scheme is not everyone's cup of tea and I am against it. One way to look at it though if you must do it is as a stepping stone to bigger and better things. Many of the career airlines require x number of hours on heavy jets ( 55T+ ) and ej aircraft fit nicely into this area.
A large number of people left ej last year, myself included, with many of these being TRSS people. They left still with large proportion of their loans still to pay to fly for the likes of BA, Virgin etc. Why? lifestyle, career prospects etc. They did the sums and worked out even owing the loan, they would be better off if they moved to a career airline. Use it and abuse it just like ej will use and abuse you!