I have a cpl/ir with 240hrs rotary TT and have just started a type rating for one of the North Sea operators - It took me 6 months to secure a job and start my type rating after my IR so my opinion may be a little biased!!!
but...
It worked for me - maybe i was lucky (i dont know). If you want it - go for it and dont let anybody tell you otherwise. If your a little apprehensive about working on the North Sea then excercise caution as the money may be better spent on an FI course.
HP1982