When I got there (around 3PM EST) the line was quick to enter the Speed Factory and you had to make sure while in line to sign up on adidas.com/AM4NYC to be able to be apart of the activities inside. These activities included a photo booth that took your picture, a scanner that scanned your feet to determine your size, and a treadmill that would manually speed up or slow down depending how fast you ran. The whole space was filled with shoes, posters, LED displays, etc. (See pictures below for more details)
When I finished the Speed Factory Lab there was a free t-shirt booth where Chinatown Market representatives using a handheld laser inkjet printer would print a maximum of 2 logos however many times you wanted. The t-shirt tends to run out quick and they most likely will not have your size depending on what time of the day you go. I had the second to last t-shirt before they ran out and had to get a size bigger than what I normally wear. This line was longer than the one to get inside the Speed Factory Lab. (See pictures below to see t-shirt)
Overall the event was fun and enjoyable, I recommend everybody to go if they can. The AM4NYC shoes weren't available for purchase at this event and instead you were told to try online or at flagship locations in the city. The event was available 4/26/18 - 4/27/18 from 9AM - 9PM EST. The location was at 11 Water St. Brooklyn, NY and you entered through the left and exit towards the far right.
For more in depth details and pictures check out Sneaker News post - http://bit.ly/2I18OkQ
For a video describing the event check out Complex's video - http://bit.ly/2FqHmKf