First impression: Poor.
Timing: Bad timing. Not only is this event starting shortly after the previous, but it is starting right after the new Guest race,
Grand Prizes: First of all, we can't see all the Grand Prizes, so we can't tell if it is worth trying to get the set. More importantly, why is the first so-called "Grand Prize" a Wishing Well and not one of the set building. Of the three GP I casn see only the second one is part of the set. The other two are Wishing Well and a Monument of Ancient Knowledge.
@Marindor Is this some sort of joke, or did someone put in the wrong prizes? A 2x2 EXPIRING building that gives some Culture and 3 KP instant every 48 hours is NOT a Grand !Prize