I had the honor to participate in this event as an operator on 40m CW and 12m CW.
Despite the fact SX90IARU was aired only for 1 month (December 2015), our great team managed to rank 2nd in QSO totals, amongst special xx90IARU stations from other countries, behind the German staff. We even surpassed the Russians !!! But, have in mind that the German and Russian special callsigns were active almost throughout 2015 !!
Our operators' effort was rewarded with a beautiful operator certificate signed by the president of IARU himself.
We are now looking forward to the century jubilee of IARU, where we will be again part of any special event to take place !!