If the company offering the rating is Helog. Be careful!
Then, there are not too many 330's around in the civilian marked, so it won't help you all that much in the future, besides the medium-twin-hours you get. The a/c is similar to the AS-332C1, the short Super-puma as it is basically an upgraded 330 but two diffrent type-ratings in the license.
A much better bet if you want into the off-shore scene, is that you apply to the serious operators and get the 332 rating or instead.
My 2 cents
Nubian