galdian ...
I dealt with one of the three and they left a particularly bad taste in my mouth. Friends dealt with the other two with similar results. There is plenty of info on PPRuNE regarding contract violations and legal actions with regard to one of these outfits in particular, but the level of integrity is pretty much the same from any of them. The only contracting company that I know to be considered upright is CCL, though there are some newer players that may be ok too.
Doug ...
Re the haircut, nobody left immediately because there was no place to go at the time. Since then, well let's just say that KAL's decision to hire non-type rated pilots is not exactly a coincidence. As for hoping that the contracts get more respect now, not a chance. There will likely be a continuous little chipping away to whatever terms you think you have along with the occasional big bite (a la the haircut) when it is deemed necessary. When it comes to Korean Air and contracts the only valid approach is the cynical one.
ELAC