Loads of guys, i'm not one and wasn't going to reply but as no else has i thought i'd just post something. i've flown with quite a few who within a year or two have progressed into the 78, and they all seem really happy. Everyone (i believe) is full time now and the previous part time deal has been lifted. One ex 73 loco i flew with was taking home about 4-4.5k a month as the 78 generates lots of duty pay.
A big change however this time is that any 75/76 joiners will have to be based in Scandi land for Winter which will put lots off... maybe that's why the hours requirement is so low.
Cheers