I was surprised to see that Gulf Air received a rating at all! In this site they request us to write at least 150 words. I would write my comments briefly here.
In brief my experience with Gulf Air is that;
1) They are usually late,
2) Multiple cases of Lost & Never Found or Recovered luggages (mine was in 2001 where I had personal items that were lost and never recovered),
3) Leaving their passengers, regardless of flying class, in the airport throughout the night on 22 Dec. 2005 on their flight from Bahrain to Abu Dhabi while keeping facts from the passengers about when the next flight will be available,
4) Forcing all First Class and Business Class passengers to travel in Economy Class without at least apologizing to them
5) And finally refusal to refund difference between paid for Business Class and actually provided Economy Class.
I would consider these issues of serious nature that would require a serious review of this Airline rating.