I was seconded to a large Scandanavian carrier in the early 2000's. Fantastic flying and really brilliant guys generally but holy crap they were militant union wise.
Even though we were on an exchange program where exactly the same number of Scandi pilots would come to fly for us in the UK we were subject to very close scrutiny by the line pilots and often questioned why we were there 'taking their flying'. If we were rostered what was considered a prime trip it would swiftly be withdrawn after some vocal and public complaints.
That said, if you need the job and its the only option then of course your family needs come first - however I have heard anecdotally that some Monarch guys fortunate enough to be offered both Virgin and SAIL are taking the SAIL job just to keep their fourth stripe.
If you've no alternative then fair enough but in my experience it won't be that pleasant for them passing through CPH or ARN.