[3] On Wednesday, May 8, 2024, the portals were introduced in their respective cities, with the New York screen being installed on the Flatiron South Public Plaza at 23rd Street, Fifth Avenue and Broadway next to the Flatiron Building, while the Dublin screen was positioned on O'Connell Street.

[5] On June 12, 2024, a collaboration of the Museum of Mathematics in Manhattan and Maths Week Ireland saw 10-year-old schoolchildren in both New York City and Dublin use the portal to challenge each other to solve several puzzles.

[9][10][11] Some on the Dublin side displayed pornography[12] and imagery of the September 11 attacks, projected profanities from their phone screens, and performed indecent exposure.

[13] A Dublin City Council spokesperson said the authority had seen a "very small minority" behaving unsuitably, and technical solutions to address it were being implemented.

[16] Shortly after the New York-Dublin Portal was reactivated in May 2024, the novelist Megan Nolan wrote for The Guardian: "There was something simian about the Portal, not only in that it felt zoo-like being regarded by the other side as they waited to be entertained, but also in the way that people behave when language is out of bounds.