Sorry to bring up an old thread, but I could not find a more recent thread to post in. Hopefully the mods will move this post if there is a more appropriate thread.

Just got off the phone with Tallin to cancel a 2-4-1 booking I had made and was very surprised to hear that the AmEx Premiuem (Sweden) 2-4-1 are now valid for 2 years (not the date of issue+next calendar year). I had not see this before, but it was good news as we were having trouble making use of the 2-4-1 before the end of 2017. This gives us ample time to find something better.