We had a wonderful time at Irina's apartment.
It is located wonderfully in the city with quick walks to all our planned events in the Marais. It's only a very short walk from Rose Bakery and a small hike from Chez Prune so there will be no excuse for going hungry.
The apartment itself was also great. Larger than our one bedroom in New York and with plenty of light throughout. There was plenty of room for us to lounge and spread out but we didn't end up spending that much time indoors anyways.
I can't recommend this apartment highly enough as it will be where I try to stay the next time I am in Paris.