I used it for 15 days. First impressions: very large capsules, but who swallow easily. As often with Omega, a fishy odor after having swallowed, it is not very pleasant, but it was the case with all the omegas I used dietary supplement.
Efficiency: always hard to say. Personally I have not seen any difference, but there is not that omega (a lack of permanent sleep can destroy you own health).
In any case the combination of the three omega 3, 6 and 9 makes it an interesting addition for those of you who have a poor diet. I think it will go beyond 15 days, or make small cures regularly.