And that's what you have to weigh up against the initial offering when reaching a decision should you be offered a position..
Keep in mind that Ezy have some flex on their expansion plans should the market change and that your unlikely to get a command at your home base unless its LGW. Mind you at LGW you could succeed in securing a training position as an F/O, I understand some have become TRI's so some of that experience might be rewarded if you impress the right people.
My advice would be to look well ahead, get as much info as you can and make a reasoned decision. Bit like flying really.
No guarantee's, that's why it's a punt. For some the pro's will outweigh the cons for others they will not. DYOR